I was disposed straightway to search for other truths and when I had
represented to myself the object of the geometers, which I conceived to be
a continuous body or a space indefinitely extended in length, breadth, and
height or depth, divisible into divers parts which admit of different
figures and sizes, and of being moved or transposed in all manner of ways
(for all this the geometers suppose to be in the object they contemplate),
I went over some of their simplest demonstrations. And, in the first
place, I observed, that the great certitude which by common consent is
accorded to these demonstrations, is founded solely upon this, that they
are clearly conceived in accordance with the rules I have already laid
down In the next place, I perceived that there was nothing at all in these
demonstrations which could assure me of the existence of their object:
thus, for example, supposing a triangle to be given, I distinctly
perceived that its three angles were necessarily equal to two right
angles, but I did not on that account perceive anything which could assure
me that any triangle existed: while, on the contrary, recurring to the
examination of the idea of a Perfect Being, I found that the existence of
the Being was comprised in the idea in the same way that the equality of
its three angles to two right angles is comprised in the idea of a
triangle, or as in the idea of a sphere, the equidistance of all points on
its surface from the center, or even still more clearly; and that
consequently it is at least as certain that God, who is this Perfect
Being, is, or exists, as any demonstration of geometry can be.

But the reason which leads many to persuade them selves that there is a
difficulty in knowing this truth, and even also in knowing what their mind
really is, is that they never raise their thoughts above sensible objects,
and are so accustomed to consider nothing except by way of imagination,
which is a mode of thinking limited to material objects, that all that is