Pythagoras

Avoid excess in all things.

The world is built upon the power of numbers.

Silence is better than foolish speech.

Learn to be silent; let your mind listen and absorb.

The purest treasure mortal times afford is spotless reputation.

Geometry is knowledge of the eternally existent.

No one is free who is not master of himself.

The knowledge of number is the greatest of all arts.

Harm no one; help all.

The soul of man is divided into three parts: intelligence, reason, and passion.

In it [the soul] there is a calculating part, a spirited part, and a desirous part.

The best path to wisdom is through moderation.

Numbers are the highest degree of knowledge.

Let thy speech be better than silence, or be silent.

The eternal gods have ordained that justice should be the measure of all things.

Abstain from beans.

Do not touch white cocks.

The tetraktys is the most binding oath.

Harmony is the union of opposites.

The monad is the principle of number.