There is no doubt that human survival will continue to depend more and more on human intellect and technology. It is idle to argue whether this is good or bad. The point of no return was passed long ago, before anyone knew it was happening.

Seen in the light of evolution, biology is, perhaps, intellectually the most satisfying and inspiring science. Without that light it becomes a pile of sundry facts -- some of them interesting or curious but making no meaningful picture as a whole.

Nature's stern discipline enjoins mutual help at least as often as warfare. The fittest may also be the gentlest.

The living world is not a single array... connected by unbroken series of intergrades.

The more we know, the better we realize that our knowledge is a little island in the midst of an ocean of ignorance.

No evidence is powerful enough to force acceptance of a conclusion that is emotionally distasteful.

There is no doubt that human survival will continue to depend more and more on human intellect and technology. It is idle to argue whether this is good or bad. The point of no return was passed long ago, before anyone knew it was happening.