Max Planck — "Physical science is that department of knowledge which is concerned with the law…"

"No burden is so heavy for a man to bear as a succession of happy days."

"The pioneer in a new field of knowledge is never a popular man."

"The true pioneer is a man who, if necessary, is prepared to go into the wilderness alone, without anyone following him."

"We have no right to assume that any physical laws exist, or if they have existed up to now, that they will continue to exist in a similar manner in the future."

"A scientist is a man who tries to understand the world by experiment, and a philosopher is a man who tries to understand the world by thought."