"I have achieved neither fame nor wealth, but I have learned to know the human heart."

"Refrain from illusions, insist on work, and not on words, patiently search divine and scientific truth."

"I saw in a dream a table where all the elements fell into place as required. Awakening, I immediately wrote it down on a piece of paper, only in one place did a correction later seem necessary."

"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…"

"The universe is a vast chemical laboratory."