How long can men thrive between walls of brick, walking on asphalt pavements, breathing the fumes of coal and of oil, growing, working, dying, with hardly a thought of wind, and sky, and fields of grain, seeing only machine-made beauty, the mineral-like quality of life?

Shut your eyes and you will know what I mean by thought entombed in darkness. Light comes through the senses, and not only through the sense of sight. When you see without feeling, you are still partly blind; you lack the inner light that brings awareness. Awareness requires the interplay of every faculty, the use of your entire being as an eye.

How long can men thrive between walls of brick, walking on asphalt pavements, breathing the fumes of coal and of oil, growing, working, dying, with hardly a thought of wind, and sky, and fields of grain, seeing only machine-made beauty, the mineral-like quality of life?

When I watch species other than my own, their instinct's wisdom is what most impresses and disturbs me.

Instead of agitating for war, the Jewish groups in this country should be opposing it in every possible way, for they will be among the first to feel its consequences. Tolerance is a virtue that depends upon peace and strength. History shows that it cannot survive war and devastation. A few very far-sighted Jewish people realize this and stand opposed to intervention. But the majority still do not. Their greatest danger to this country lies in their ownership and influence in our motion pictures, our press, our radio, and our government.

Life without risks is not worth living.

If I were entering adulthood now instead of in the environment of fifty years ago, I would choose a career that kept me in touch with nature more than science. ... Too few natural areas remain; both by intent and by indifference we have insulated ourselves from the wilderness that produced us.