For all our failings, despite our limitations and fallibilities, we humans are capable of greatness.

We are, in the most profound sense, children of the Cosmos.

Any civilization that doesn't develop space travel dies.

If we are to survive, our loyalties must be broadened further, to include the whole human community, the entire planet Earth.

How lucky we are to live in this time / the first moment in human history / when we are in fact visiting other worlds

Skeptical scrutiny is the means, in both science and religion, by which deep thoughts can be winnowed from deep nonsense.

I believe our future depends powerfully on how well we understand this cosmos in which we float, like a mote of dust in the morning sky.