Plato

The flute is not an instrument that has a good moral effect - it is too exciting.

If a man be endowed with a generous mind, this is the best kind of nobility.

Ignorance of all things is an evil neither terrible nor excessive, nor yet the greatest of all; but great cleverness and much learning, if they be accompanied by a bad training, are a much greater misfortune.

Mankind censure injustice fearing that they may be the victims of it, and not because they shrink from committing it.

Justice is having and doing what is one's own.

The knowledge of which geometry aims is the knowledge of the eternal.

No law or ordinance is mightier than understanding.

The life which is not examined is not worth living.

The greatest penalty of evildoing - namely, to grow into the likeness of bad men.

At the touch of love everyone becomes a poet.