Some racists still reject the plain testimony written in the DNA that all the races are not only human but nearly indistinguishable. . . .

In all our searching, the only thing we've found that makes the emptiness bearable is each other.

Personally, I would be delighted if there were a life after death, especially if it permitted me to continue to learn about this world and others, if it gave me a chance to discover how history turns out.

The Cosmos is all that is or was or ever will be. Our feeblest contemplations of the Cosmos stir us -- there is a tingling in the spine, a catch in the voice, a faint sensation, as if a distant memory, of falling from a height. We know we are approaching the greatest of mysteries.

Perhaps the depth of love can be calibrated by the number of different selves that are actively involved in a given relationship.

The total number of stars in the Universe is larger than all the grains of sand on all the beaches of the planet Earth.

[Kepler] preferred the hard truth to his dearest illusions, and that is the heart of science.