Plato

Music is a moral law. It gives soul to the universe, wings to the mind, flight to the imagination, and charm and gaiety to life and to everything.

Good people do not need laws to tell them to act responsibly, while bad people will find a way around the laws.

Love is the joy of the good, the wonder of the wise, the amazement of the Gods.

When men speak ill of thee, live so as nobody may believe them.

We ought to fly away from earth to heaven as quickly as we can; and to fly away is to become like God, as far as this is possible; and to become like him is to become holy, just, and wise.

No one knows whether death, which people fear to be the greatest evil, may not be the greatest good.

No evil can happen to a good man, either in life or after death.

The learning and knowledge that we have, is, at the most, but little compared with that of which we are ignorant.

Let parents bequeath to their children not riches, but the spirit of reverence.

To prefer evil to good is not in human nature; and when a man is compelled to choose one of two evils, no one will choose the greater when he might have the less.

Ignorance, the root and stem of all evil.

There are two things a person should never be angry at, what they can help, and what they cannot.

Dictatorship naturally arises out of democracy, and the most aggravated form of tyranny and slavery out of the most extreme liberty.

When the tyrant has disposed of foreign enemies by conquest or treaty, and there is nothing more to fear from them, then he is always stirring up some war or other, in order that the people may require a leader.

How can you prove whether at this moment we are sleeping, and all our thoughts are a dream; or whether we are awake, and talking to one another in the waking state?

If a man neglects education, he walks lame to the end of his life.

Democracy... is a charming form of government, full of variety and disorder; and dispensing a sort of equality to equals and unequals alike.

Truth is the beginning of every good to the gods, and of every good to man.

The god of love lives in a state of need. It is a need. It is an urge. It is a homeostatic imbalance. Like hunger and thirst, it's almost impossible to stamp out.

Human behavior flows from three main sources: desire, emotion, and knowledge.

There are three classes of men; lovers of wisdom, lovers of honor, and lovers of gain.

Every heart sings a song, incomplete, until another heart whispers back. Those who wish to sing always find a song. At the touch of a lover, everyone becomes a poet.

He who is of calm and happy nature will hardly feel the pressure of age, but to him who is of an opposite disposition youth and age are equally a burden.

And what, Socrates, is the food of the soul? Surely, I said, knowledge is the food of the soul.