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

Know what you are talking about.

The reading of all good books is like conversation with the finest men of past centuries.

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

A little knowledge is a dangerous thing. So is a lot.

Knowledge, Action, Devotion are complementary to each other.

There is one quality which one must possess to win, and that is definiteness of purpose, the knowledge of what one wants, and a burning desire to possess it.

Never help a child with a task at which he feels he can succeed.

I prefer the company of peasants because they have not been educated sufficiently to reason incorrectly.

To every action there is always an equal and opposite or contrary, reaction

Technology is just a tool. In terms of getting the kids working together and motivating them, the teacher is the most important.

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.

The schools ain't what they used to be and never was.

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

Science is a rising force, It is creating a new world about us. It needs to be watched and pressed into service, and in any case, it would be courting disaster to ignore it.

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.

Many much-learned men have no intelligence.

A cynic is a man who knows the price of everything, and the value of nothing.

The ability to observe without evaluating is the highest form of intelligence.

There is no authority who decides what is a good idea.