"Our senses are not always to be trusted."

"The power of judging well and of distinguishing the true from the false, which is properly what is called good sense or reason, is by nature equal in all men."

"Perfect numbers like perfect men are very rare."

"I resolved to feign that all the perceptions I had ever received were no truer than the illusions of my dreams."

"I am a thinking thing, a substance whose whole essence or nature consists in thinking, and there is no need of any place, nor does it depend on any material thing."