An understanding of the natural world is a source of not only great curiosity, but great fulfilment.

The only limit to our realization of tomorrow will be our doubts of today.

Experience keeps a dear school, but fools will learn in no other.

Common sense is in spite of, not as the result of education.

Wrong life cannot be lived rightly.

Tact is the knack of making a point without making an enemy.

We never see ourselves as others see us.

The first method for estimating the intelligence of a ruler is to look at the men he has around him.

Nobody has the power to take two steps together; you can take only one step at a time.

Instinct is a marvellous thing. It can neither be explained nor ignored.

The path to success is to take massive, determined action.

Science is organized knowledge. Wisdom is organized life.

If we don't believe in freedom of expression for people we despise, we don't believe in it at all.

It has seemed to be more necessary to have regard to the weight of words rather than to their number.

Never put off for tomorrow, what you can do today.

Knowledge speaks, but wisdom listens

To me, being an intellectual doesn't mean knowing about intellectual issues; it means taking pleasure in them.

Nothing is more intolerable than to have to admit to yourself your own errors.

All our knowledge begins with the senses, proceeds then to the understanding, and ends with reason. There is nothing higher than reason.

Desire is poverty. Desire is the greatest impurity of the mind. Desire is the motive force for action. Desire in the mind is the real impurity. Even a spark of desire is a very great evil.

Tomorrow hopes we have learned something from yesterday.