'I have been impressed with the urgency of doing. Knowing is not enough; we must apply. Being willing is not enough, we must do.'
– Leonardo da Vinci (1492-1519)
Antonio Calanni/AP/File
11 quotes from difference makers
Ever wonder how you can help create positive change? Here is advice from 10 outstanding people whose lives made a difference in the world.
2. Leonardo da Vinci
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