Small is the number of them that see with their own eyes and feel with their own hearts.

I have no special talent. I am only passionately curious.

Galileo had already made a significant beginning toward a knowledge of the law of motion. He discovered the law of inertia and the law of bodies falling freely in the gravitational field of the earth.

Brief is this existence, as a visit in a strange house. The path to be pursued is poorly lit by a flickering consciousness.

I am truly a "lone traveler" and have never belonged to my country, my home, my friends, or even my immediate family, with my whole heart.

The only race I know is the human one.

What counts can't always be counted; what can be counted doesn't always count.