It's obvious that the key problem facing humanity in the coming century is how to bring a better quality of life - for 8 billion or more people - without wrecking the environment entirely in the attempt.

If those committed to the quest fail, they will be forgiven. When lost, they will find another way. The moral imperative of humanism is the endeavor alone, whether successful or not, provided the effort is honorable and failure memorable.

If history and science have taught us anything, it is that passion and desire are not the same as truth.

True character arises from a deeper well than religion.

It's obvious that the key problem facing humanity in the coming century is how to bring a better quality of life - for 8 billion or more people - without wrecking the environment entirely in the attempt.

Destroying rainforest for economic gain is like burning a Renaissance painting to cook a meal.

Blind faith, no matter how passionately expressed, will not suffice. Science for its part will test relentlessly every assumption about the human condition.

Perhaps the time has come to cease calling it the "environmentalist" view, as though it were a lobbying effort outside the mainstream of human activity, and to start calling it the real-world view.

If all mankind were to disappear, the world would regenerate back to the rich state of equilibrium that existed ten thousand years ago. If insects were to vanish, the environment would collapse into chaos.

Every major religion today is a winner in the Darwinian struggle waged among cultures, and none ever flourished by tolerating its rivals.

The historical circumstance of interest is that the tropical rain forests have persisted over broad parts of the continents since their origins as stronghold of the flowering plants 150 million years ago.

The essence of humanity's spiritual dilemma is that we evolved genetically to accept one truth and discovered another. Is there a way to erase the dilemma, to resolve the contradictions between the transcendentalist and the empiricist world views?

It's like having astronomy without knowing where the stars are.

The one process now going on that will take millions of years to correct is the loss of genetic and species diversity by the destruction of natural habitats. This is the folly our descendants are least likely to forgive us.

To the extent that philosophical positions both confuse us and close doors to further inquiry, they are likely to be wrong.

You are capable of more than you know. Choose a goal that seems right for you and strive to be the best, however hard the path. Aim high. Behave honorably. Prepare to be alone at times, and to endure failure. Persist! The world needs all you can give.

Sometimes a concept is baffling not because it is profound but because it is wrong.

A very Faustian choice is upon us: whether to accept our corrosive and risky behavior as the unavoidable price of population and economic growth, or to take stock of ourselves and search for a new environmental ethic.

When you have seen one ant, one bird, one tree, you have not seen them all.

Old beliefs die hard even when demonstrably false.

By any reasonable measure of achievement, the faith of the Enlightenment thinkers in science was justified.

We should preserve every scrap of biodiversity as priceless while we learn to use it and come to understand what it means to humanity.

There is no better high than discovery.

Even as empiricism is winning the mind, transcendentalism continues to win the heart.

We are drowning in information, while starving for wisdom. The world henceforth will be run by synthesizers, people able to put together the right information at the right time, think critically about it, and make important choices wisely.

Political ideology can corrupt the mind, and science.

People need a sacred narrative. They must have a sense of larger purpose, in one form or another, however intellectualized. They will find a way to keep ancestral spirits alive.

Without a trace of irony I can say I have been blessed with brilliant enemies. I owe them a great debt, because they redoubled my energies and drove me in new directions.

Nature holds the key to our aesthetic, intellectual, cognitive and even spiritual satisfaction.

The human mind evolved to believe in the gods. It did not evolve to believe in biology.

Theology made no provision for evolution. The biblical authors had missed the most important revelation of all! Could it be that they were not really privy to the thoughts of God?

America in particular imposes an horrendous burden on the world. We have this wonderful standard of living but it comes at enormous cost.

An individual ant, even though it has a brain about a millionth of a size of a human being's, can learn a maze; the kind we use is a simple rat maze in a laboratory. They can learn it about one-half as fast as a rat.

Ants are the dominant insects of the world, and they've had a great impact on habitats almost all over the land surface of the world for more than 50-million years.

Ants have the most complicated social organization on earth next to humans.

Ants make up two-thirds of the biomass of all the insects. There are millions of species of organisms and we know almost nothing about them.

Because the living environment is what really sustains us.

But once the ants and termites jumped the high barrier that prevents the vast variety of evolving animal groups from becoming fully social, they dominated the world.

Change will come slowly, across generations, because old beliefs die hard even when demonstrably false.

Companies that are willing to share, to withhold in order to further the growth of the company, willing to try to get a better atmosphere through a demonstration of democratic principles, fairness and cooperation, a better product, those will win in the end.

Competing is intense among humans, and within a group, selfish individuals always win. But in contests between groups, groups of altruists always beat groups of selfish individuals.

Every kid has a bug period... I never grew out of mine.

For me, the peculiar qualities of faith are a logical outcome of this level of biological organization.

I doubt that most people with short-term thinking love the natural world enough to save it.

I had in mind a message, although I hope it doesn't intrude too badly, persuading Americans, and especially Southerners, of the critical importance of land and our vanishing natural environment and wildlife.

I see no way out of the problems that organized religion and tribalism create other than humans just becoming more honest and fully aware of themselves.

I'm very much a Christian in ideals and ethics, especially in terms of belief in fairness, a deep set obligation to others, and the virtues of charity, tolerance and generosity that we associate with traditional Christian teaching.

I've found that good dialogue tells you not only what people are saying or how they're communicating but it tells you a great deal - by dialect and tone, content and circumstance - about the quality of the character.

Ideas emerge when a part of the real or imagined world is studied for its own sake.