The more that you read, the more things you will know. The more that you learn, the more places you'll go.

Attitude, not Aptitude, determines Altitude.

What's done can't be undone.

Reflect upon your present blessings, of which every man has many; not on your past misfortunes, of which all men have some.

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

Although our intellect always longs for clarity and certainty, our nature often finds uncertainty fascinating.

Adapt what is useful, reject what is useless, and add what is specifically your own.

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

Experience is the only prophecy of wise men.

Beauty is not in the face; beauty is a light in the heart.

The greatest minds are capable of the greatest vices as well as of the greatest virtues.

If you have no problems, then you have no clue to what is going.

Think globally, act locally.

Criticize the act, not the person.

The heart has its reasons which reason knows not.

There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self.

You don't become what you want, you become what you believe

It is not the strength, but the duration, of great sentiments that makes great men.

To be one, to be united is a great thing. But to respect the right to be different is maybe even greater.

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

It takes a great deal of bravery to stand up to our enemies, but just as much to stand up to our friends.