What you leave behind is not what is engraved in stone monuments, but what is woven into the lives of others.”

If we worked on the assumption that what is accepted as true really is true, then there would be little hope for advance.”

Fitting in and avoiding conflict is not how ideas evolve. Ideas evolve by standing out.”

Never doubt that a small group of thoughtful committed citizens can change the world; indeed it is the only thing that ever has.”

You never really change things by fighting the existing reality. To change something, build a new model that makes the existing model obsolete”

We cannot solve our problems with the same thinking we used when we created them.”