Strength does not come from physical capacity. It comes from an indomitable will.

Those who can not change their minds can not change anything.

Experience is merely the name men gave to their mistakes.

Creativity is the process of having original ideas that have value.

Judge not unless you judge yourself.

Anger begins in folly, and ends in repentance.

Empty pockets never held anyone back. Only empty heads and empty hearts can do that.

The greatest pride, or the greatest despondency, is the greatest ignorance of one's self.

If you place your head in a lion's mouth, then you cannot complain one day if he happens to bite it off.

The most certain sign of wisdom is cheerfulness.

If I speak of myself in different ways, that is because I look at myself in different ways.

Nothing is so strong as gentleness, nothing so gentle as real strength

All imperfection is easier to tolerate if served up in small doses.

Not everything that can be counted counts, and not everything that counts can be counted.

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

The experience gathered from books, though often valuable,is but the nature of learning whereas the experience gained from actual life is of the nature of wisdom.

We choose our joys and sorrows long before we experience them.

When you judge another, you do not define them, you define yourself.

One who deceives will always find those who allow themselves to be deceived.

A man is literally what he thinks.

Muddy water is best cleared by leaving it alone.