“If we ever established contact with intelligent life on another world, there would be barriers to communication. First, they would be many light years away, so signals would take many years to reac...”

“It is foolish to claim, as some do, that emigration into space offers a long-term escape from Earth's problems. Nowhere in our solar system offers an environment even as clement as the Antarctic or...”

“Not even the most secular among us can fail to be uplifted by Christianity's architectural legacy - the great cathedrals. These immense and glorious buildings were erected in an era of constricted ...”

“Maybe the search for life shouldn't restrict attention to planets like Earth. Science fiction writers have other ideas: balloon-like creatures floating in the dense atmospheres of planets such as J...”

“The images of Earth's delicate biosphere, contrasting with the sterile moonscape where the astronauts left their footsteps, have become iconic for environmentalists: these may indeed be the Apollo ...”

“We need to broaden our sympathies both in space and time - and perceive ourselves as part of a long heritage, and stewards for an immense future.”

“I have seen the best of you, and the worst of you, and I choose both.”

“Be the one who nurtures and builds. Be the one who has an understanding and a forgiving heart one who looks for the best in people. Leave people better than you found them.”

“Was it possible that the emotion of love had somehow made me more susceptible to fear? Does the noble emotion of love make us start valuing our own lives and the lives of our loved ones more so tha...”

“Power is not revealed by striking hard or often, but by striking true.”

“As time and space are bent by gravity, so too is truth bent by power.”

“What a curious power words have.”

“They had killed themselves over our dying forests, over manatees maimed by propellers as they surfaced to drink from garden hoses; they had killed themselves at the sight of used tires stacked high...”

“The world seemed to shimmer a little at the edges.”

“If we cannot accept the importance of the world, which considers itself important, if in the midst of that world our laughter finds no echo, we have but one choice: to take the world as a whole and...”