Certainly science has moved forward. But when science progresses, it often opens vaster mysteries to our gaze. Moreover, science frequently discovers that it must abandon or modify what it once believed. Sometimes it ends by accepting what it has previously scorned.

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

The journey is difficult, immense. We will travel as far as we can, but we cannot in one lifetime see all that we would like to see or to learn all that we hunger to know.

I am not nearly so interested in what monkey man was derived from as I am in what kind of monkey he is to become.

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 is frequently the tragedy of the great artist, as it is of the great scientist, that he frightens the ordinary man.

The freedom to create is somehow linked with facility of access to those obscure regions below the conscious mind.