Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution.

Employ your time in improving yourself by other men's writings, so that you shall gain easily what others have labored hard for.

Somewhere, something incredible is waiting to be known.

Knowledge will give you power, but character, respect.

I'm not a master, I'm a student-master, meaning that I have the knowledge of a master and the expertise of a master, but I'm still learning, So I'm a student-master. I don't believe in the word master, I consider the master as such when they close the casket.

As our circle of knowledge expands, so does the circumference of darkness surrounding it.

Where knowledge ends, religion begins.

Bodily exercise, when compulsory, does no harm to the body; but knowledge which is acquired under compulsion obtains no hold on the mind.

I think this is the most extraordinary collection of talent, of human knowledge, that has ever been gathered together at the White House, with the possible exception of when Thomas Jefferson dined alone. Address at a White House dinner honoring Nobel Prize winners (April 1962)

The best way to become acquainted with a subject is to write a book about it.

To be conscious that you are ignorant of the facts is a great step to knowledge.