A thought is an idea in transit.

The delight of opening a new pursuit, or a new course of reading, imparts the vivacity and novelty of youth even to old age.

What is freedom of expression? Without the freedom to offend, it ceases to exist.

Learning gives creativity, Creativity leads to thinking, Thinking provides knowledge, Knowledge makes you great.

Evil being the root of mystery, pain is the root of knowledge.

The highest result of education is tolerance.

The task of a writer is not to solve the problem but to state the problem correctly.

If you want the present to be different from the past, study the past.

Patience is a virtue, and I'm learning patience. It's a tough lesson.

The first idea the child must acquire is that of the difference between good and evil.

Any sufficiently advanced technology is indistinguishable from magic.

The deepest sin against the human mind is to believe things without evidence.

An investment in knowledge pays the best interest.

Common sense is the collection of prejudices acquired by age eighteen.

I cannot teach anybody anything. I can only make them think

Just because I don't care doesn't mean I don't understand.

Medicine is my lawful wife and literature my mistress; when I get tired of one, I spend the night with the other.

For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.

Books! I dunno if I ever told you this, but books are the greatest gift one person can give another.

I am a part of everything that I have read.

Study hard what interests you the most in the most undisciplined, irreverent and original manner possible.