“Who mourns makes grief his master.
Who drinks makes pleasure his master.”

"Lady With a Fan"
Song lyrics, (1977)

Gessler, Act III, sc. iii, as translated by Sir Thomas Martin
Wilhelm Tell (1803)

Source: Unless You Become Like This Child

(A.J. Broomhall. Hudson Taylor and China’s Open Century, Book Five: Refiner’s Fire. London: Hodder and Stoughton and Overseas Missionary Fellowship, 1985, 78).

This has appeared on the internet attributed to Buchan, but is actually John Bunyan, as quoted in The Westminster Collection of Christian Quotations (2001) by Martin H. Manser
Misattributed

Source: The Picture of Dorian Gray

Book X: The Pope, line 1185.
The Ring and the Book (1868-69)

Reported as frequently quoted but unverified in Respectfully Quoted: A Dictionary of Quotations (1989), which states, "it cannot be found in the official writings and pronouncements of Bismarck. It is possible that he said it, and it was passed on orally rather than being recorded, or that he expressed the sentiment in other terms and the idea took this form as others tried to quote him".
Disputed

Source: The Name of the Wind