Physics is like sex: sure, it may give some practical results, but that's not why we do it.
Human behavior flows from three main sources: desire, emotion, and knowledge
Better know nothing than half-know many things.
Know what you are talking about.
What is now proved was once only imagined.
Science is not only a disciple of reason but, also, one of romance and passion.
Learning never exhausts the mind.
The only good is knowledge and the only evil is ignorance.
One test of the correctness of educational procedure is the happiness of the child.
An investment in knowledge pays the best interest.
Courage, conviction and confidence.
A little knowledge that acts is worth infinitely more than much knowledge that is idle.
Free the child's potential, and you will transform him into the world.
A cynic is a man who knows the price of everything, and the value of nothing.
A child educated only at school is an uneducated child.
I don't look on poetry as closed works. I feel they're going on all the time in my head and I occasionally snip off a length.
A thought is an idea in transit.
Educate the children and it won't be necessary to punish the men.
I have no special talents. I am only passionately curious.
Many much-learned men have no intelligence.
For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.
