"Ambition is so powerful a passion in the human breast, that however high we reach we are never satisfied."

"He who has not first laid his foundations may be able with great ability to lay them afterwards, but they will be laid with trouble to the architect and danger to the building."

"Since love and fear can hardly exist together, if we must choose between them, it is far safer to be feared than loved."

"There is nothing more difficult to take in hand, more perilous to conduct or more uncertain in its success than to take the lead in the introduction of a new order of things."

"War is a profession by which a man cannot live honorably; an employment by which the soldier, if he would reap any profit, is obliged to be false, rapacious, and cruel."

"There is no avoiding war; it can only be postponed to the advantage of others."

"If you don't make mistakes, you're not working on hard enough problems. And that's a big mistake."

"PRE-EXISTENCE, n. An unnoted factor in creation."

"To fly we have to have resistance."

"A ruffled mind makes a restless pillow."

"Count not him among your friends who will retail your privacies to the world."

"Love is an ideal thing, marriage a real thing; a confusion of the real with the ideal never goes unpunished."