A scientific man ought to have no wishes, no affections, - a mere heart of stone.

Look up at the stars and not down at your feet. Try to make sense of what you see, and wonder about what makes the universe exist. be curious.

“If you know the enemy and know yourself you need not fear the results of a hundred battles.”

It doesn't do good to open doors for someone who doesn't have the price to get in. If he has the price, he may not need the laws. There is no law saying the Negro has to live in Harlem or Watts.

Man's greatness consists in his ability to do and the proper application of his powers to things needed to be done.

To bring about change, you must not be afraid to take the first step. We will fail when we fail to try.

All men can see these tactics whereby I conquer, but what none can see is the strategy out of which victory is evolved.

All sciences are now under the obligation to prepare the ground for the future task of the philosopher, which is to solve the problem of value, to determine the true hierarchy of values.

We believed in our idea - a family park where parents and children could have fun- together.

We are just an advanced breed of monkeys on a minor planet of a very average star. But we can understand the universe. That makes us something very special.

Those who do not know how to live must make a merit of dying.

Cannot possibly attend first night. Will attend second, if there is one.