There is a great difference between mind and body insomuch as body is by nature always divisible, and the mind is entirely indivisible.

Even if I were to suppose that I was dreaming and whatever I saw or imagined was false, yet I could not deny that ideas were truly in my mind.

There is a great difference between mind and body insomuch as body is by nature always divisible, and the mind is entirely indivisible.

Whatever I have up till now accepted as most true and assured I have gotten either from the senses or through the senses. But from time to time I have found that the senses deceive, and it is prudent never to trust completely those who have deceived us even once.

Except our own thoughts, there is nothing absolutely in our power.

Everything is self-evident.

Intuition is the undoubting conception of a pure and attentive mind, which arises from the light of reason alone, and is more certain than deduction.