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

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 goes without saying that the desire to accomplish the task with more confidence, to avoid wasting time and labour, and to spare our experimental animals as much as possible, made us strictly observe all the precautions taken by surgeons in respect to their patients.

Learn, compare, collect the facts!

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.

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

Possibilities are like the wings of birds; they allow man to soar and to climb to the heavens. And facts are like the atmosphere against which those wings must beat, and without which the soaring bird will surely plummet back to earth.