“A man can suffocate on courtesy.”

“A man's riches are based on what he can do without.”

“How can any man be weak who dares to be at all?”

“A man is rich in proportion to the number of things which he can afford to let alone.”

“Man is an animal who more than any other can adapt himself to all climates and circumstances.”

“It is desirable that a man live in all respects so simply and preparedly that if an enemy take the town... he can walk out the gate empty-handed and without anxiety.”

“But man's capacities have never been measured; nor are we to judge of what he can do by any precedents, so little have been tried.”