For, in the language of Heraclitus, the virtuous soul is pure and unmixed light, springing from the body as a flash of lightning darts from the cloud. But the soul that is carnal and immersed in sense, like a heavy and dank vapor, can with difficulty be kindled, and caused to raise its eyes heavenward.
PlutarchFor the correct analogy for the mind is not a vessel that needs filling, but wood that needs igniting.
PlutarchFor he who gives no fuel to fire puts it out, and likewise he who does not in the beginning nurse his wrath and does not puff himself up with anger takes precautions against it and destroys it.
PlutarchChildren ought to be led to honorable practices by means of encouragement and reasoning, and most certainly not by blows and ill treatment.
Plutarch