Only idiots refuse to change their minds.

Things which matter most must never be at the mercy of things which matter least.

The oldest, shortest words- 'yes' and 'no'- are those which require the most thought.

To avoid criticism say nothing, do nothing, be nothing.

All the great things are simple, and many can be expressed in a single word: freedom; justice; honor; duty; mercy; hope.

The greatest power we have is the power of choice.

Choose rather to be strong of soul than strong of body.

Talent is God given. Be humble. Fame is man-given. Be grateful. Conceit is self-given. Be careful.

The one you buy will be the only one that doesn't work.

The essence of knowledge is, having it, to apply it; not having it, to confess your ignorance.

A person who spends more than he earns is a fool

A man is literally what he thinks.

The greatest of wealth is the richness of the soul.

It takes a great man to be a good listener.

To a wise and good man the whole earth is his fatherland.

We thought that we had the answers, it was the questions we had wrong.

In anger we should refrain both from speech and action.

How often I found where I should be going only by setting out for somewhere else.

The impossible could not have happened, therefore the impossible must be possible in spite of appearances.

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

Be frank and explicit. That is the right line to take when you wish to conceal your own mind and to confuse the minds of others.