Men are apt to be much more influenced by words than by the actual facts of the surrounding reality

As we have seen, bread, and especially dry bread, evokes secretion of considerably larger quantities of saliva than meat.

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

It is not accidental that all phenomena of human life are dominated by the search for daily bread - the oldest link connecting all living things, man included, with the surrounding nature.

Perfect as the wing of a bird may be, it will never enable the bird to fly if unsupported by the air. Facts are the air of science. Without them a man of science can never rise.

Learn the ABC of science before you try to ascend to its summit.

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