The man who goes alone can start today; but he who travels with another must wait until the other person is ready.

Explore your higher latitudes . . . be a Columbus to whole new continents and worlds within you, open new channels, not of trade but of thought.

If one advances confidently in the direction of his dreams, and endeavors to live the life which he had imagined, he will meet with a success unexpected in common hours.

I live in the present. I only remember the past, and anticipate the future.

If you have built castles in the air, your work need not be lost; that is where they should be. Now put the foundations under them.

Successful start-ups have one really differentiating quality — the art of trying harder.