"There are many hypotheses in science which are wrong. That’s perfectly all right: it’s the aperture to finding out what’s right. Science is a self-correcting process."
"The near side of a galaxy is tens of thousands of light-years closer to us than the far side; thus we see the front as it was tens of thousands of years before the back. But typical events in galactic dynamics occupy tens of millions of years, so the error in thinking of an image of a galaxy as frozen in one moment of time is small."
"And you are made of a hundred trillion cells. We are, each of us, a multitude."
"Every one of us is, in the cosmic perspective, precious. If a human disagrees with you, let him live. In a hundred billion galaxies, you will not find another."
"The beauty of a living thing is not the atoms that go into it, but the way those atoms are put together."
"When we look up at night and view the stars, everything we see is shinning because of distant nuclear fusion."