The biggest obstacle was mixing abortion with overpopulation. These are two things that have nothing to do with each other.

The real cure for our environmental problems is to understand that our job is to salvage Mother Nature. We are facing a formidable enemy in this field. It is the hunters... and to convince them to leave their guns on the wall is going to be very difficult.

It is certain that the study of human psychology, if it were undertaken exclusively in prisons, would also lead to misrepresentation and absurd generalizations.

The road to the future leads us smack into the wall. We simply ricochet off the alternatives that destiny offers. Our survival is no more than a question of 25, 50 or perhaps 100 years.

The sea, once it casts its spell, holds one in its net of wonder forever.

From birth, man carries the weight of gravity on his shoulders. He is bolted to earth. But man has only to sink beneath the surface and he is free.

The happiness of the bee and the dolphin is to exist. For man it is to know that and to wonder at it.

When one man, for whatever reason, has the opportunity to lead an extraordinary life, he has no right to keep it to himself.

In order to stabilize world population, we must eliminate 350,000 per day.

People protect what they love.

Water and air, the two essential fluids on which all life depends, have become global garbage cans.

Mankind has probably done more damage to the Earth in the 20th century than in all of previous human history.

If we go on the way we have, the fault is our greed and if we are not willing to change, we will disappear from the face of the globe, to be replaced by the insect.

No sooner does man discover intelligence than he tries to involve it in his own stupidity.

The sea, the great unifier, is man's only hope. Now, as never before, the old phrase has a literal meaning: we are all in the same boat.

No aquarium, no tank in a marine land, however spacious it may be, can begin to duplicate the conditions of the sea. And no dolphin who inhabits one of those aquariums or one of those marine lands can be considered normal.

We forget that the water cycle and the life cycle are one.

A lot of people attack the sea, I make love to it.

What is a scientist after all? It is a curious man looking through a keyhole, the keyhole of nature, trying to know what's going on.

It takes generosity to discover the whole through others. If you realize you are only a violin, you can open yourself up to the world by playing your role in the concert.