Plato

I have hardly ever known a mathematician who was capable of reasoning.

The heaviest penalty for deciding to engage in politics is to be ruled by someone inferior to yourself.

Every man is a poet when he is in love.

Necessity who is the mother of our invention.

Wealth ... and poverty: the one is the parent of luxury and indolence and the other of meanness and vicious-ness and both of discontent.

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

There are three classes of men-lovers of wisdom lovers of honour lovers of gain.

Love - a grave mental disease.

He who commits injustice is ever made more wretched than he who suffers it.

Be kind for everyone you meet is fighting a hard battle.

The man who makes everything that leads to happiness depend upon himself and not upon other men has adopted the very best plan for living happily.

To be is to do.

Writing is the geometry of the soul.

Excellent things are rare.

All learning has an emotional base.

Boys should abstain from all use of wine until their eighteenth year for it is wrong to add fire to fire.

Everything that deceives may be said to enchant.

Courage is a kind of salvation.