Those who are really convinced that they have made progress in science would not demand freedom for the new views to continue side by side with the old, but the substitution of the new views for the old.

Do you want to spend the rest of your life selling sugared water or do you want a chance to change the world?

The whole of science is nothing more than a refinement of everyday thinking.

The philosophers have only interpreted the world, in various ways: the point, however, is to change it.

People always fear change. People feared electricity when it was invented, didn't they? People feared coal, they feared gas-powered engines... There will always be ignorance, and ignorance leads to fear. But with time, people will come to accept their silicon masters.

I alone cannot change the world, but I can cast a stone across the waters to create many ripples.