I would maintain that thanks are the highest form of thought, and that gratitude is happiness doubled by wonder.

The only thing worse than being blind is having sight but no vision.

The powers of the mind are like the rays of the sun when they are concentrated they illumine.

If learning the truth is the scientist's goal... then he must make himself the enemy of all that he reads.

Joy is the holy fire that keeps our purpose warm and our intelligence aglow.

„It’s not the years in your life that count. It’s the life in your years.”

You cannot have what you do not want.