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

While you are experimenting, do not remain content with the surface of things. Don't become a mere recorder of facts, but try to penetrate the mystery of their origin.

Facts are the air of the scientists. Without them you never can fly.

Don't become a mere recorder of facts, but try to penetrate the mystery of their origin.

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

Our experiments not only proved the existence of a nervous apparatus in the above-mentioned glands, but also disclosed some facts clearly showing the participation of these nerves in normal activity.