What we achieve inwardly will change outer reality.

The authors of great evils know best how to remove them.

When I myself had twice or thrice made a resolute resistance unto anger, the like befell me that did the Thebans; who, having once foiled the Lacedaemonians (who before that time had held themselves invincible), never after lost so much as one battle which they fought against them.

We rich men count our felicity and happiness to lie in these superfluities, and not in those necessary things.

It is easy to utter what has been kept silent, but impossible to recall what has been uttered.

Socrates said he was not an Athenian or a Greek, but a citizen of the world.

Medicine to produce health must examine disease; and music, to create harmony must investigate discord.