We need to learn to set our course by the stars, not by the lights of every passing ship."

Never use intuition.

"We are given one life and the decision is ours whether to wait for circumstances to make up our mind or whether to act, and in acting, to live."

Our technology has already outstripped our ability to control it.

"I am convinced that the best service a retired general can perform is to turn in his tongue along with his suit, and to mothball his opinions."