All progress has resulted from people who took unpopular positions.

... men may rise on stepping-stones On their dead selves to higher things.

We are never as modern, as far ahead of the past as we like to think we are.

Civilization advances by extending the number of important operations which we can perform without thinking about them.

And, step by step, since time began, I see the steady gain of man.

If it keeps up, man will atrophy all his limbs but the push-button finger.

Creation was not finished at the dawn of this earth, but creation continues, and we have a lot to do to make the world a better place.

You cannot hope to build a better world without improving the individuals. To that end each of us must work for his own improvement, and at the same time share a general responsibility for all humanity, our particular duty being to aid those to whom we think we can be most useful.

We consider progress as legitimate only when it reinforces, rather than undermines, freedom and democracy.

Whenever you take a step forward, you are bound to disturb something. You disturb the air as you go forward, you disturb the dust, the ground. You trample upon things. When a whole society moves forward, this trampling is on a much bigger scale; and each thing that you disturb, each vested interest which you want to remove, stands as an obstacle.