Quote by Friedrich Wöhler
"Patience in research is as important as precision in measurement."
More from Friedrich Wöhler
"Organic chemistry just now is enough to drive one mad. It gives me the impression of a dark labyrinth into which one fears to enter without Ariadne's thread."
"The great principle of chemistry is that the whole is equal to the sum of its parts."
"I have made a great discovery. I have synthesized urea without needing a kidney or an animal in any way."
"The synthesis of urea proves that we can prepare an organic substance from inorganic materials."