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Ever wonder how you can help create positive change? Here is advice from 10 outstanding people whose lives made a difference in the world.
A crowd in the Santa Maria delle Grazie church in Milan, Italy, views Leonardo Da Vinci's masterpiece 'The Last Supper.' (Antonio Calanni/AP/File)
2. Leonardo da Vinci
'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)
