"The Earth is too small for us."

"The only good Indian is a dead Indian—this is true in America as in India."

"Science, my lad, is composed of errors, but errors that it is good to commit, for they lead little by little to the truth."

"the Indians were in the act of plunging themselves into the drunkenness caused by liquid opium mingled with hemp."

"It is a great joy to be alive and to see the world."