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A43987 Elements of philosophy the first section, concerning body / written in Latine by Thomas Hobbes of Malmesbury ; and now translated into English ; to which are added Six lessons to the professors of mathematicks of the Institution of Sr. Henry Savile, in the University of Oxford.; De corpore. English Hobbes, Thomas, 1588-1679. 1656 (1656) Wing H2232; ESTC R22309 317,285 430

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neer enough to any Body we perceive the Motion and Going of the same we distinguish it thereby from a Tree a Column and other fixed Bodies and so that motion or going is the Property thereof as being proper to living creatures and a faculty by which they make us distinguish them from other Bodies 5 How the knowledge of any Effect may be gotten from the knowledge of the Generation thereof may easily be understood by the example of a Circle For if there be set before us a plain figure having as neer as may be the figure of a Circle we cannot possibly perceive by sense whether it be a true Circle or no then which neverthelesse nothing is more easie to be known to him that knowes first the Generation of the propounded figure For let it be known that the figure was made by the circumduction of a Body whereof one end remained unmoved and we may reason thus a Body carried about retaining alwayes the same length applies it selfe first to one Radius then to another to a third a fourth and successively to all and therefore the same length from the same point toucheth the circumference in every part thereof which is as much to say as all the Radii are equal We know therefore that from such generation proceeds a figure from whose one middle point all the extreame points are reached unto by equal Radii And in like manner by knowing first what figure is set before us we may come by Ratiocination to some Generation of the same though perhaps not that by which it was made yet that by w ch it might have been made for he that knows that a Circle has the property above declared will easily know whether a Body carried about as is said will generate a Circle or no. 6 The End or Scope of Philosophy is that we may make use to our benefit of effects formerly seen or that by applicatiō of Bodies to one another we may produce the like effects of those we conceive in our minde as far forth as matter strength industry will permit for the commodity of humane life For he inward glory and triumph of mind that a man may have for the mastering of some difficult and doutfull matter or for the discovery of some hidden truth is not worth so much paines as the study of Philosophy requires nor need any man care much to teach another what he knowes himselfe if he think that will be the onely benefit of his labour The end of Knowledge is Power and the use of Theoremes which among Geometricians serve for the finding out of Properties is for the construction of Problemes and lastly the scope of all speculation is the performing of some action or thing to be done 7 But what the Utility of Philosophy is especially of Natural Philosophy and Geometry will be best understood by reckoning up the chief commodities of which mankind is capable and by comparing the manner of life of such as enjoy them with that of others which want the same Now the greatest commodities of mankind are the Arts namely of measuring Matter and Motion of moving ponderous Bodies of Architecture of Navigation of making instruments for all uses of calculating the Coelestiall Motions the Aspects of the Stars and the parts of Time of Geography c. By which Sciences how great benefits men receive is more easily understood then expressed These benefits are enjoyed by almost all the people of Europe by most of those of Asia and by some of Africa but the Americans and they that live neer the Poles do totally want them But why Have they sharper wits then these Have not all men one kinde of soule and the same faculties of mind What then makes this difference except Philosophy Philosophy therefore is the cause of all these benefits But the Utility of Morall and Civil Philosophy is to be estimated not so much by the commodities we have by knowing these Sciences as by the calamities we receive from not knowing them Now all such calamities as may be avoided by humane industry arise from warre but chiefly from Civil warre for from this proceed Slaughter Solitude and the want of all things But the cause of warre is not that men are willing to have it for the Will has nothing for Object but Good at least that which seemeth good Nor is it from this that men know not that the effects of war are evil for who is there that thinks not poverty and losse of life to be great evils The cause therefore of Civill warre is that men know not the causes neither of Warre nor Peace there being but few in the world that have learned those duties which unite and keep men in peace that is to say that have learned the rules of civill life sufficiently Now the knowledge of these rules is Morall Philosophy But why have they not learned them unlesse for this reason that none hitherto have taught them in a clear and exact method For what shall we say Could the ancient Masters of Greece Egypt Rome and others perswade the unskillfull multitude to their innumerable opinions concerning the nature of their Gods which they themselves knew not whether they were true or false and which were indeed manifestly false absurd could they not perswade the same multitude to civill duty if they themselves had understood it Or shall those few writings of Geometricians which are extant be thought sufficient for the taking away of all controversy in the matters they treat of and shall those innumerable and huge Volumes of Ethicks be thought unsufficient if what they teach had been certain and well demonstrated What then can be imagined to be the cause that the writings of those men have increased science and the writings of these have increased nothing but words saving that the former were written by men that knew and the later by such as knew not the doctrine they taught onely for ostentation of their wit and eloquence Neverthelesse I deny not but the reading of some such books is very delightfull for they are most eloquently written and containe many cleer wholsome and choice sentences which yet are not universally true though by them universally pronounced From whence it comes to passe that the circumstances of times places and persons being changed they are no lesse frequently made use of to confirme wicked men in their purposes then to make them understand the precepts of Civill duties Now that which is chiefly wanting in them is a true and certaine rule of our actions by which we might know whether that we undertake be just or unjust For it is to no purpose to be bidden in every thing to do Right before there be a certain Rule and measure of Right established which no man hitherto hath established Seeing therefore from the not knowing of Civill duties that is from the want of Morall science proceed Civill warres and the greatest calamities of mankind we may very well attribute to
Metaphysical Empusa not by skirmish but by letting in the light upon her For I am confident if any confidence of a Writing can proceed from the Writers fear circumspection diffidence that in the three former parts of this Book all that I have said is sufficiently demonstrated from Definitions all in the fourth part from Suppositions not absurd But if there appear to your Lordship any thing less fully demonstrated then to satisfie every Reader the cause was this that I professed to write not all to all but some things to Geometricians onely But that your Lordship will be satisfied J cannot doubt There remains the second Section which is concerning Man That part thereof where J handle the Optiques contayning six Chapters together with the Tables of the Figures belonging to them I have already written engravenlying by me above these six years The rest shall as soon as J can be added to it though by the contumelies petty injuries of some unskilful men I know already by experience how much greater thanks will be due then payed me for telling Men the truth of what Men are But the burthen I have taken on me I mean to carry through not striving to appease but rather to revenge my self of Envy by encreasing it For it contents me that I have your Lordships favour which being all you require J acknowledge and for which with my prayers to Almighty God for your Lordships safety J shall to my power be always thankefull London April 23 1655. YOUR LORDSHIPS most humble Servant Thomas Hobbes The Authors Epistle To the Reader THink not courteous Reader that the Philosophy the Elements whereof I am going to set in order is that which makes Philosophers Stones nor that which is found in the Metaphsique Codes But that it is the Natural Reason of Man busily flying up and down among the Creatures bringing back a true report of their Order Causes Effects Philosophy therefore the Childe of the World and your own Mind is within your self perhaps not fashioned yet but like the World its Father as it was in the beginning a thing confused Do therefore as the Statuaries do who by hewing off that which is superfluous do not make but find the Image Or imitate the Creation If you will be a Philosopher in good earnest let your Reason move upon the Deep of your own Cogitations and Experience Those things that lie in Confusion must be set asunder distinguished and every one stampt with its own name set in order that is to say your Method must resemble that of the Creation The order of the Creation was Light Distinction of Day and Night the Firmament the Luminaries Sensible Creatures Man and after the Creation the Commandement Therefore the order of Contemplation will be Reason Definition Space the Starres Sensible Quality Man and after Man is grown up Subjection to Command In the first part of this Section which is entitled Logique I set up the light of Reason In the Second which hath for title the Grounds of Philosophy I distinguish the most common Notions by accurate definition for the avoiding of confusion and obscurity The third part concerns the Expansion of Space that is Geometry The fourth contains the Motion of the Starres together with the doctrine of Sensible Qualities In the second Section if it please God shall be handled Man In the third Section the doctrine of Subjection is handled already This is the Method I followed and if it like you you may use the same for I do but propound not commend to you any thing of mine But whatsoever shall be the Method you will like I would very fain commend Philosophy to you that is to say the study of Wisdome for want of which we have all suffered much dammage lately For even they that study Wealth do it out of love to Wisdome for their Treasures serve them but for a Looking-glass wherin to behold and contemplate their owne Wisdome Nor do they that love to be employed in publike business aime at any thing but place wherein to shew their Wisdome Neither do Voluptuous men neglect Philosophy but onely because they know not how great a pleasure it is to the Mind of Man to be ravished in the vigorous and perpetual embraces of the most beauteous World Lastly though for nothing else yet because the Mind of Man is no less impatient of Empty Time then Nature is of Empty Place to the end you be not forced for want of what to do to be troublesome to men that have business or take hurt by falling into idle Company but have somewhat of your own wherewith to fill up your time I recommend unto you the Study of Philosophy Farewell T. H. The Titles of the CHAPTERS The first Part or Logique CHAP. 1 Of Philosophy CHAP. 2 Of Names CHAP. 3 Of Proportion CHAP. 4 Of Syllogisme CHAP. 5 Of Erring Falsity and Captions CHAP. 6 Of Method The Second Part or The first Grounds of Philosophy CHAP. 7 Of Place and Time CHAP. 8 Of Body and Accident CHAP. 9 Of Cause and Effect CHAP. 10 Of Power and Act. CHAP. 11 Of Identity and Difference CHAP. 12 Of Quantity CHAP. 13 Of Analogisme or the Same Proportion CHAP. 14 Of Straight and Crocked Angle and Figure The third Part Of the Proportions of Motions and Magnitudes CHAP. 15 Of the Nature Properties and divers considerations of Motion and Endeavour CHAP. 16 Of Motion Accelerated and Uniform and of Motion by Concourse CHAP. 17 Of Figures Deficient CHAP. 18 Of the Equation of Straight Lines which the Crooked Lines of Parabolas and other Figures made in imitation of Parabolas CHAP. 19 Of Angles of Incidence and Reflexion equal by supposition CHAP. 20 Of the Dimension of a Circle and the Division of Arches or Angles CHAP. 21 Of Circular Motion CHAP. 22 Of other Variety of Motions CHAP. 23 Of the Center of Equiponderation of Bodies pressing downwards in straight parallel lines CHAP. 24 Of Refraction and Reflexion The fourth Part of Physiques or the Phaenomena of Nature CHAP. 25 Of Sense and Animall Motion CHAP. 26 Of the World and of the Starres CHAP. 27 Of Light Heat and of Colours CHAP. 28 Of Cold Wind Hard Ice Restitution of Bodies bent Diaphanous Lightning and Thunder and of the Heads of Rivers CHAP. 29 Of Sound Odour Savour and Touch. CHAP. 30 Of Gravity COMPUTATION OR LOGIQUE CHAP. I. Of Philosophy 1 The Introduction 2 The Definition of Philosophy explained 3 Ratiocination of the Mind 4 Properties what they are 5 How Properties are known by Generation contrarily 6 The Scope of Philosophy 7 The Utility of it 8 The Subject 9 The Parts of it 10 The Epilogue PHILOSOPHY seems to me to be amongst men now in the same manner as Corn and Wine are said to have been in the world in ancient time For from the beginning there were Vines and Ears of Corn growing here and there in the fields but no care was taken for the