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When young one is confident to be able to build palaces for mankind, but when the time comes one has one's hands full just to be able to remove their trash.Letter to Johann Kaspar Lavatar (March 6, 1780)
Treat people as if they were what they ought to be and you help them to become what they are capable of being.
All truly wise thoughts have been thoughts already thousands of times; but to make them truly ours, we must think them over again honestly, till they take root in our personal experience.