That which is apprehended by intelligence and reason is always in the same state; but that which is conceived by opinion with the help of sensation and without reason, is always in a process of becoming and perishing and never really is.

The measure of a man is what he does with power.

According to Greek mythology, humans were originally created with four arms, four legs and a head with two faces. Fearing their power, Zeus split them into two separate parts, condemning them to spend their lives in search of their other halves.

Love is a serious mental disease.

The only real ill-doing is the deprivation of knowledge.

What a poor appearance the tales of poets make when stripped of the colours which music puts upon them, and recited in simple prose.

There is a ... matter - much more valuable and divine than natural philosophy . ... On this matter I must speak to you in enigmas.