All sciences are vain and full of errors that are not born of Experience, the mother of all Knowledge.

If you can't explain it simply, you don't understand it well enough.

Books are as useful to a stupid person as a mirror is useful to a blind person.

To read is to fly: it is to soar to a point of vantage which gives a view over wide terrains of history, human variety, ideas, shared experience and the fruits of many inquiries.

I think that kids have a greater capacity for processing things than we give them credit for.

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

Courage, conviction and confidence.

The only true wisdom is in knowing you know nothing.

If help and salvation are to come, they can only come from the children, for the children are the makers of men.

Knowing is not enough; we must apply. Willing is not enough; we must do.

Human behavior flows from three main sources: desire, emotion, and knowledge

Knowledge, Action, Devotion are complementary to each other.

A little knowledge that acts is worth infinitely more than much knowledge that is idle.

Although modesty is natural to man, it is not natural to children. Modesty only begins with the knowledge of evil.

Imagination is the source of every form of human achievement. And it's the one thing that I believe we are systematically jeopardizing in the way we educate our children and ourselves.

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

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

Educate the children and it won't be necessary to punish the men.

Real knowledge is to know the extent of one's ignorance.

Integrity without knowledge is weak and useless, and knowledge without integrity is dangerous and dreadful.

The secret of life is not enjoyment but education through experience.