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"We spend our lives waiting for the ideal moment to begin something, not realizing that the ideal moment is the one we decide to start."
The only phrase I've ever disliked is, 'Why, we've always done it that way.' I always tell young people, 'Go ahead and do it. You can always apologize later.'
You have to be comfortable with being uncomfortable if you want to make progress in mathematics.
The deepest fear of humanity is the fear of the unknown.