“Impossibilities are merely things which we have not yet learned.”

If you look into your own heart, and you find nothing wrong there, what is there to worry about? What is there to fear?

All truths are easy to understand once they are discovered; the point is to discover them.

The road leading to a goal does not separate you from the destination; it is essentially a part of it.

Liberty, taking the word in its concrete sense, consists in the ability to choose.

Science is the key to our future, and if you don't believe in science, then you're holding everybody back.

A single conversation across the table with a wise person is worth a months study of books.

People are so constituted that everybody would rather undertake what they see others do, whether they have an aptitude for it or not.