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.

...in every man there is an eye of the soul, which...is more precious far than ten thousand bodily eyes, for by it alone is truth seen.

The most virtuous are those who content themselves with being virtuous without seeking to appear so.

All learning is in the learner, not the teacher.

As it is, lovers of inquiry must follow their beloved wherever it may lead.

Shall we not, then, lay down a law, in the first place, that boys shall abstain altogether from wine till their eighteenth year, thereby teaching that it is wrong to add fire to fire, as through a funnel, pouring it into their body and soul before they proceed to the labor of life, thus exercising a caution as to the maddening habits of youth.

False words are not only evil in themselves, but they infect the soul with evil.