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

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.

Imagination will often carry us to worlds that never were, but without it we go nowhere.

The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of starstuff.

If you wish to make an apple pie from scratch, you must first invent the universe.

The Earth is a very small stage in a vast cosmic arena.

Except in pure mathematics, nothing is known for certain (although much is certainly false).

Every kid starts out as a natural-born scientist, and then we beat it out of them. A few trickle through the system with their wonder and enthusiasm for science intact.

One of the greatest gifts adults can give – to their offspring and to their society – is to read to children.

I’ve always thought an agnostic is an atheist without the courage of his convictions.

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

A heaven so clear, an earth so calm, So sweet, so soft, so hushed an air; And, deepening still the dreamlike charm, Wild moor-sheep feeding everywhere.

No matter what happens, I’m loud, noisy, earthy and ready for much more living.

Gratitude is not a mere word; it is not a mere concept. It is the living breath of your real existence on earth.

If we have the power to turn another planet into Earth, then we have the power to turn Earth back into Earth.

Glance at the sun. See the moon and the stars. Gaze at the beauty of earth’s greenings. Now, think. What delight God gives to humankind with all these things . All nature is at the disposal of humankind. We are to work with it. For without we cannot survive.

When I die, I will send down a shower of roses from the heavens,I will spend my heaven by doing good on earth.

I firmly believe we can make our own miracles if we believe strongly enough in ourselves and our mission on earth.

Holy persons draw to themselves all that is earthly.