„The successful man will profit from his mistakes andtry again in a different way.“

— Dale Carnegie

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„It's said that a wise person learns from his mistakes. A wiser one learns from others' mistakes. But the wisest person of all learns from others's successes.“
— John C. Maxwell
„Try not to become a man of success but rather try to become a man of value.“
— Albert Einstein
„Arguments from authority carry little weight – authorities have made mistakes in the past. They will do so again in the future. Perhaps a better way to say it is that in science there are no authorities; at most, there are experts.“
— Carl Sagan
„If you try to be anyone but yourself, you will fail; if you are not true to your own heart, you will fail. Then again, there's no success like failure“
— Bob Dylan
„Again and again the imaginary plan on which one attempts to build up that order breaks down and then we must try another. This imaginative vision and faith in the ultimate success are indispensable. The pure rationalist has no place here.“
— Max Planck