"The mind is a substance whose whole essence or nature is to think, and which needs no place, nor depends on any material thing, in order to exist."

"I am certain that I am a thinking thing, and that I have a body, and that I am distinct from my body."

"I always wanted to learn to distinguish the true from the false, in order to see clearly in my actions and to walk with confidence in this life."

"If you would be a real seeker after truth, it is necessary that at least once in your life you doubt, as far as possible, all things."

"The greatest good is to live with reason, and therefore, to live without passions."