This is the most important ...

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.
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 Lois McMaster Bujold

Quotes from the same author

It was never what I wanted to buy that held my heart's hope. It was what I wanted to be.
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 Lois McMaster Bujold
Think of the glory. Think of your reputation. Think how great it'll look on your next resume." On my cenotaph, you mean. Nobody will be able to collect enough of my scattered atoms to bury. You going to cover my funeral expenses, son?" Splendidly. Banners, dancing girls, and enough beer to float your coffin to Valhalla." - Miles coaxing Ky Tung to agree to an almost suicidal mission
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 Lois McMaster Bujold
Reputation is what other people know about you. Honor is what you know about yourself.
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 Lois McMaster Bujold
Honor is what you know about yourself.
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 Lois McMaster Bujold
War is not its own end, except in some catastrophic slide into absolute damnation. It's peace that's wanted. Some better peace than the one you started with.
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 Lois McMaster Bujold