All our thinking is of this nature, a free play with concepts.

I have no extraordinary ability. I'm simply an inquisitive individual.

Nature hides her secrets because of her essential loftiness, but not by means of ruse.

Energy cannot be created or destroyed, it can only be changed from one form to another.

There's a genius in all of us.

Our defense is not in our armaments, nor in science, nor in going underground. Our defense is in law and order.

Numerous are the academic professors, but rare are wise and noble teachers.