There are yet remaining many Things concerning Gods Attributes, and many things concerning the nature of my self or of my Mind, which ought to be searched into: but these perhaps I shall set upon at some other Opportunity. And at Present nothing seems to me more requisite (feeling I have discover’d what I must avoid, and what I must Do for the Attaining of Truth) then that I imploy my Endeavours to free my self from those doubts into which I have lately fallen, and that I try whether I can have any certainty of Material Things.
But before I enquire whether there be any such things Really Existent without Me, I ought to consider the Ideas of those things, as they are in my Thoughts and try which of them are Distinct, which confused.
In which search I find that I distinctly imagine Quantity, that which Philosophers commonly call continued, that is to say, the Extension of that Quantity or thing continued into Length, Breadth, and Thickness, I can count in it divers Parts, to which parts I can assign Bigness, Figure, Position, and Local Motion, to which Local Motion I can assign Duration. Neither are only these Generals plainly discover’d and known by Me, but also by attentive Consideration, I perceive Innumerable particulars concerning the Shapes, Number, and Motion of These Bodies; The Truth whereof is so evident, and agreeable to my Nature, that when I first discover’d them, I seemed not so much to have Learnt any thing that is new, as to have only remembred what I have known before, or only to have thought on those things which were in me before, tho this be the first time that I have examin’d them so diligently.
One thing there is worthy my Consideration, which is, that I find in my self innumerable Ideas of certain things, which tho perhaps they exist no where without Me, yet they cannot Be said to be Nothing; and tho they are Thought upon by me at my will and pleasure, yet they are not made by Me, but have their own True and Immutable Natures. As when, for example, * I Imagine a Triangle, tho perhaps such a Figure Exists no where out of my Thoughts, nor ever will Exist, yet the Nature thereof is determinate, and its Essence or Form is Immutable and Eternal, which is neither made by me, nor depends on my mind, as appears for that many properties may be demonstrated of this Triangle, viz. That its three Angles are equal to two right ones, that to its Greatest Angle the Greatest side is subtended, and such like, which I now clearly know whether I will or not, tho before I never thought on them, when I imagine a Triangle, and consequently they could not be invented by Me. And ’tis nothing to the purpose for me to say, that perhaps this Idea of a Triangle came to me by the Organs of sense, because I have sometimes seen bodies of a Triangular Shape; for I can think of Innumerable other Figures, which I cannot suspect to have come in through my senses, and yet I can Demonstrate various properties of them, as well as of a Triangle, which certainly are all true, seeing I know them clearly, and therefore they are something, and not a meer Nothing, for ’tis Evident that what is true is something.
And now I have sufficiently Demonstrated, that what I clearly perceive, is True; And tho I had not demonstrated it, yet such is the Nature of my Mind, that I could not but give my Assent to what I so perceive, at least, as long as I so perceive it; and I remember (heretofore when I most of all relied on sensible Objects) that I held those Truths for the most certain which I evidently perceived, such as are concerning Figures, Numbers, with other parts of Arithmetick, and Geometry, as also whatever relates to pure and abstracted Mathematicks.
Now therefore, if from this alone, That I can frame the Idea of a Thing in my Mind, it follows, That whatever I clearly and distinctly perceive belonging to a thing, does Really belong to it; Cannot I from hence draw an Argument to Prove the Existence of a God? Certainly I find the Idea of a God, or infinitely perfect Being, as naturally in me, as the Idea of any Figure, or Number; and I as clearly and distinctly understand that it appertains to his Nature Always to Be, as I know that what I can demonstrate of a Mathematical Figure or Number belongs to the Nature of that Figure or Number: so that, tho all things which I have Meditated upon these three or four days were not true, yet I may well be as certain of the Existence of a God, as I have hitherto been of Mathematical Truths.