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

Science demands from a man all his life. If you had two lives that would not be enough for you. Be passionate in your work and in your searching.

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.

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.

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

The digestive canal represents a tube passing through the entire organism and communicating with the external world, i.e. as it were the external surface of the body, but turned inwards and thus hidden in the organism.

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