The future is neither ahead nor behind, on one side or another. Nor is it dark or light. It is contained within ourselves; its evil and good are perpetually within us.

Animals are molded by natural forces they do not comprehend. To their minds there is no past and no future. There is only the everlasting present of a single generation, its trails in the forest, its hidden pathways in the the air and in the sea. There is nothing in the Universe more alone than Man. He has entered into the strange world of history.

Of all the unexpected qualities of an unexpected universe, the sheer organizing power of animal and plant metabolism is one of the most remarkable. . . . Where it reaches its highest development, in the human mind, we forget it completely. . . . So important does nature regard this unseen combustion . . . that a starving man's brain will be protected to the last while his body is steadily consumed.

It has been asserted that we are destined to know the dark beyond the stars before we comprehend the nature of our own journey.

It is surely one of the curious paradoxes of history that science which professionally has little to do with faith, owes its origins to an act of faith that the universe can be rationally interpreted, and that science today is sustained by that assumption.

I once saw, on a flower pot in my own living room, the efforts of a field mouse to build a remembered field. I have lived to see this episode repeated in a thousand guises, and since I have spent a large portion of my life in the shade of a nonexistent tree I think I am entitled to speak for the field mouse.

This is the most enormous extension of vision of which life is capable: the projection of itself into other lives. This is the lonely, magnificent power of humanity. It is . . . the supreme epitome of the reaching out.