Humans are very good at dreaming, although you'd never know it from your television.

A new consciousness is developing which sees the earth as a single organism and recognizes that an organism at war with itself is doomed. We are one planet.

Cutting off fundamental, curiosity-driven science is like eating the seed corn. We may have a little more to eat next winter but what will we plant so we and our children will have enough to get through the winters to come?

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

A celibate clergy is an especially good idea, because it tends to suppress any hereditary propensity toward fanaticism.

Science is an attempt, largely successful, to understand the world, to get a grip on things, to get hold of ourselves, to steer a safe course. Microbiology and meteorology now explain what only a few centuries ago was considered sufficient cause to burn women to death.

I would be very ashamed of my civilization if we did not try to find out if there is life in outer space.