How can we learn self-knowledge? Never by taking thought but rather by action. Try to do your duty and you'll soon discover what you're like.

He who knows no foreign languages knows nothing of his own.

The light is there, and colors surround us. However, if there were no light nor colors in our own eye, we wouldn't perceive such things outside of us.

No wise combatant underestimates their antagonist.

Correction does much, but encouragement does more. Encouragement after censure is as the sun after a shower.

If you want someone to develop a specific trait, treat them as though they already had it.

Ohne Hast, aber ohne Rast. - Without haste, but without rest.