Pretend you are the person you want to be; and that is who you will become.

Man is not worried by real problems so much as by his imagined anxieties about real problems.

The heights by great men reached and kept Where not attained by sudden flight, But they, while their companions slept, Were toiling upward in the night.

A man may imagine things that are false, but he can only understand things that are true.

Do not stop thinking of life as an adventure. You have no security unless you live bravely, excitingly, imaginatively.

To raise new questions, new possibilities, to regard old problems from a new angle, requires creative imagination and marks real advance in science.

I can't imagine a person becoming a success who doesn’t give this game of life everything he’s got.

Man, unlike any other thing organic or inorganic in the universe, grows beyond his work, walks up the stairs of his concepts, emerges ahead of his accomplishments.

The change in motion is proportional to the motive force impressed; and is made in the direction of the right line in which that force is impressed.

The day will soon come when I will show the world that the transmission of power and speech without the aid of any wires is possible.

No matter how dark things seem to be or actually are, raise your sights and see the possibilities - always see them, for they're always there.

I have a dream that one day on the red hills of Georgia the sons of former slaves and the sons of former slaveowners will be able to sit down together at the table of brotherhood.

Vision without execution is hallucination.