If man has not found ways to deal with environmental problems such as water and air pollution by 1998, it will be too late. The future is not determined and it lies in our own hands.

War is only an invention, not a biological necessity.

You can no longer save your family, tribe or nation. You can only save the whole world.

When I stand on a street in a Canadian city and look across the street, it couldn't be anywhere but Canada, but how can I prove it?

People in America, of course, live in all sorts of fashions, because they are foreigners, or unlucky, or depraved, or without ambition; people live like that, but Americans live in white detached houses with green shutters. Rigidly, blindly, the dream takes precedence.

The negative cautions of science are never popular. If the experimentalist would not commit himself, the social philosopher, the preacher, and the pedagogue tried the harder to give a short-cut answer.

You just have to learn not to care about the dusty mites under the beds.