"Science advances by correcting its errors."

"I shall be happy if my work contributes to the progress of the sciences, and to the well-being of mankind."

"I have never been able to believe in anything that I could not demonstrate by experiment."

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

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