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

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.

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, compare, collect the facts!

As was to be expected, the discovery of the nervous apparatus of the salivary glands immediately impelled physiologists to seek a similar apparatus in other glands lying deeper in the digestive canal.

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