“We all have a thirst for wonder. It’s a deeply human quality. Science and religion are both bound up with it.”

If we ruin the earth, there is no place else to go.

The significance of our lives and our fragile planet is then determined only by our own wisdom and courage.

All civilizations become either spacefaring or extinct.

If we continue to accumulate only power and not wisdom, we will surely destroy ourselves.

Across the sea of space, the stars are other suns.

You are worth about 3 dollars worth in chemicals.

We live on a mote of dust suspended in a sunbeam.

We can judge our progress by the courage of our questions and the depth of our answers, our willingness to embrace what is true rather than what feels good.

For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring.

The visions we offer our children shape the future.

Nature is unsentimental. Death is built in.

We are star stuff which has taken its destiny into its own hands.

Not explaining science seems to me perverse. When you’re in love, you want to tell the world.

Not all birds can fly. What separates the flyers from the walkers is the ability to take off.

Nature is always more subtle, more intricate, more elegant than what we are able to imagine.

When we look up at night and view the stars, everything we see is shinning because of distant nuclear fusion.

There is bound to be a regression toward the mean.

Money is bounded; we only have so much of it. Love goes on forever.

Aspire, break bounds. Endeavor to be good, and better still, best.

I am bound to tell what I am told, but not in every case to believe it.

The wise man sets bounds even to his innocent desires.

Love is boundless. Human energy is not.

If you play cricket for India, money is bound to come.

My humanity is bound up in yours, for we can only be human together.