“a creature who has kept a planet in its orbit for several billions of years will be able to manage a packing case!”

“In God's scheme what is a few billion years here and there. Perhaps there have come and gone a dozen human civilizations in the past billion years that we know nothing about. And after this civilization we are living in destroys itself, it will all start up again in a million years when the planet has all its messes cleaned up. Then, finally, one of these civilizations, say five billion years from now, will last because people treat each other the way they ought to.”

“Knowledge was always the power that kept the Universe in its place and the stars turning in their orbits.”

“It appears - because it has been the case for twenty years - that every problem is solvable...that no matter how badly the world economy slumps there is a pain-free way out of it. Once the realization dawns that there is not, and that the pain will be severe, the question is posed that has not really been posed for twenty years: who should feel it?”

“Fragile creatures of a small blue planet, surrounded by light years of silent space.”

“There is much that science doesn't understand, many mysteries still to be resolved. In a Universe tens of billions of light-years across and some ten or fifteen billion years old, this may be the case forever. We are constantly stumbling on new surprises”