Dmitri Mendeleev — "I have always been convinced that the universe is governed by laws that are disc…"

"I have always been a practical man, and my science is for the benefit of mankind."

"I was very much interested in spiritualism, but I found no scientific basis for it."

"It was clear that in the United States there was a development not of the best, but of the middle and worst sides of European civilization; the notorious general voting, the tendency to politics... al…"

"If statements of fact themselves depend upon the person who observes them, how much more distinct is the reflection of the personality of him who gives an account of methods and of philosophical specu…"

"It is the duty of the chemist to teach the world how to use the elements wisely."