One can truly say that the irresistible progress of natural science since the time of Galileo has made its first halt before the study of the higher parts of the brain, the organ of the most complicated relations of the animal to the external world. And it seems, and not without reason, that now is the really critical moment for natural science; for the brain, in its highest complexity-the human brain-which created and creates natural science, itself becomes the object of this science.

While you are experimenting, do not remain content with the surface of things.

Learn, compare, collect the facts!

From the described experiment it is clear that the mere act of eating, the food even not reaching the stomach, determines the stimulation of the gastric glands.

Gradualness, gradualness, and gradualness. From the very beginning of your work, school yourself to severe gradualness in the accumulation of knowledge.

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

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