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You have to have confidence in your ability, and then be tough enough to follow through.
The trouble with having an open mind, of course, is that people will insist on coming along and trying to put things in it.
Peace is not the absence of war, but the triumph of justice.
In mathematics, the journey from question to answer is often more enlightening than the answer itself.
Die Liebe ist die einzige Kraft, die imstande ist, einen Menschen zu verwandeln.