"In science as in love, too much concentration on technique can often lead to impotence."

"Running cross country is the closest man will ever get to flying."

"I chose and my word was shaken. So what? The choice may have been mistaken a€” the choosing was not. Just keep moving on..."

"Getters don't get - givers get."

"We don't want to start a nuclear war unless we really have to, now do we Jack?"

"Eventually, there will not be enough prisons if there are not enough good homes."

"When I was in England, I experimented with marijuana a time or two, and I didn't like it and didn't inhale and never tried it again."

"If one sticks too rigidly to one's principles, one would hardly see anybody."

"Why don't you want to do what you know you should do? The reason you don't is that you are in conflict with yourself."

"I hear and I forget. I see and I remember. I do and I understand."

"A jewel's just a rock put under enormous heat and pressure. Extraordinary things are always hiding in places people never think to look."

"Life is tragic for those who have plenty to live on and nothing to live for."