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.

In our time, we have sifted the sands of Mars, we have established a presence there, we have fulfilled a century of dreams!

It would be wryly interesting if in human history the cultivation of marijuana led generally to the invention of agriculture, and thereby to civilization.

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

Every star may be a sun to someone.

I can find in my undergraduate classes, bright students who do not know that the stars rise and set at night, or even that the Sun is a star.

It means nothing to be open to a proposition we don't understand.