All human life is sunk deep in untruth; the individual cannot pull it out of this well without growing profoundly annoyed with his entire past, without finding his present motives (like honor) senseless, and without opposing scorn and disdain to the passions that urge one on to the future and to the happiness in it.

Men subsequently put whatever is newly learned or experienced to use as a plowshare, perhaps even as a weapon: but women immediately include it among their ornaments.

I am not bigoted enough for a system-and not even for my system.

Distrust all in whom the impulse to punish is powerful.

[Heraclitus] concluded that coming-to-be itself could not be anything evil or unjust.

Phlegmatic natures can be inspired to enthusiasm only by being made into fanatics.

Not he is great who can alter matter, but he who can alter my state of mind.