"Here, then: a revolution [in science and chemistry] has taken place in an important part of human knowledge since your departure from Europe… I will consider this revolution to be well advanced and ev…"

"I have been so lucky in life, that I have had nothing to do but to collect the fruits of the labours of others."

"Chemistry is a science of facts and experiments, and not of opinions."

"The chemist, in his laboratory, is a magician who creates new substances."

"The most important thing for a man of science is to have a clear head and a good heart."