“What is not started today is never finished tomorrow.”

“Whether one show one's self a man of genius in science or compose a song, the only point is, whether the thought, the discovery, the deed, is living and can live on.”

“A person hears only what they understand.”

“Duty is the demand of the hour.”

“He who cannot draw on three thousand years is living from hand to mouth.”

“When correcting a child, the goal is to apply light, not heat.”

“Experience, as we know, has a way of boiling over, and making us correct our present formulas.”

“You correct an error by bringing truth to it.”