Quintilian

“Even a single hair casts its shadow.”

“Memory is the treasury and guardian of all things.”

“Habit is a second nature.”

“Though ambition in itself is a vice, yet it is often the parent of virtues.”

“The perfection of art is to conceal art.”

“Those who wish to appear wise among fools, among the wise seem foolish.”

“Nature herself has decreed that nothing great is ever born quickly.”

“A liar should have a good memory.”

“We should not write so that it is possible for the reader to understand, but so that it is impossible for him to misunderstand.”

“The mind is exercised by the variety of studies.”

“Conscience is a thousand witnesses.”

“We give to necessity the praise of virtue.”

“The learned understand the reason of art; the unlearned feel the pleasure.”

“It is the heart which makes men eloquent.”

“Laughter costs too much if it is bought at the expense of virtue.”

“The orator must be a good man.”

“It is a great thing to know the season for speech and the season for silence.”