Emperor of Rome Marcus Aurelius

Things seemingly the most insignificant imaginable are perpetually observed to be necessary conditions to other things of the greatest importance

He who does wrong does wrong against himself. He who acts unjustly acts unjustly to himself, because he makes himself bad

Everything which is earthy turns towards the earth, everything which is liquid flows together, and everything which is of an aerial kind does the same, so that they require something to keep them asunder, and the application of force