He had read much, if one considers his long life; but his contemplation was much more than his reading. He was wont to say that if he had read as much as other men he should have known no more than other men.

They absorb carbon monoxide and carbon dioxide and give out oxygen. What could be more desirable? And they look good in the bargain. Stop chopping down the rain forests and plant more saplings, and we're on our way.

People think of education as something that they can finish.

Science doesn't purvey absolute truth. Science is a mechanism... for testing your thoughts against the universe.

The day you stop learning is the day you begin decaying.

In the presence of total Darkness, the mind finds it absolutely necessary to create light.

I do not fear computers. I fear the lack of them.