Illusory joy is often worth more than genuine sorrow.

The entire method consists in the order and arrangement of the things to which the mind's eye must turn so that we can discover some truth.

We call infinite that thing whose limits we have not perceived, and so by that word we do not signify what we understand about a thing, but rather what we do not understand.

Illusory joy is often worth more than genuine sorrow.

Give me extension and motion and I will construct the universe.

Reason is nothing without imagination.

The nature of matter, or body considered in general, consists not in its being something which is hard or heavy or coloured, or which affects the senses in any way, but simply in its being something which is extended in length, breadth and depth.