This is the most important thing I will ever say to you. The human mind is the ultimate testing device. You can take all the notes you want on the technical data, anything you forget you can look up again, but this must be engraved on your hearts in letters of fire. There is nothing, nothing, nothing, more important to me in the men and women I train than their absolute personal integrity. Whether you function as welders or inspectors, the laws of physics are implacable lie detectors. You may fool men. You will never fool metal. That’s all.

The real unforgivable acts are committed by calm men in beautiful green silk rooms, who deal death wholesale, by the shipload, without lust, without anger, or desire, or any redeeming emotion to excuse them but cold fear of some pretended future. But the crimes they hope to prevent in that future are imaginary. The ones they commit in the present - they are real.

Anything worth achieving is worth overachieving.

It was never what I wanted to buy that held my heart's hope. It was what I wanted to be.

Oh, was that liquor of yours a stimulant?" asked Elena. "I wondered why he didn't fall asleep." "Couldn't you tell?" chuckled Mayhew. "Not really." Miles twisted his head to take in Elena's upside-down worried face, and smile in weak reassurance. Sparkly black and purple whirlpools clouded his vision. Mayhew's laughter faded. "My God," he said hollowly, "you mean he's like that all the time?

Suicidal glory is the luxury of the irresponsible.

Some people grow into their dreams, instead of out of them.