But man has still another powerful resource: natural science with its strictly objective methods.

School yourself to demureness and patience. Learn to inure yourself to drudgery in science. Learn, compare, collect the facts.

If scientists seriously think natural selection applies to humans, they haven't been in high school in a long time.

Every known fact in natural science was divined by the presentiment of somebody, before it was actually verified.

Natural science, does not simply describe and explain nature; it is part of the interplay between nature and ourselves.

Appetite, craving for food, is a constant and powerful stimulator of the gastric glands.