You can tell a really wonderful quote by the fact that it's attributed to a whole raft of wits.
Imagined London: A Tour of the World's Greatest Fictional CityOur greatest glory is not in never falling, but in rising every time we fall.
The Citizen of the World, Or, Letters from a Chinese Philosopher, Residing in London, to His Friends in the Country, by Dr. GoldsmithThere is only one thing which is generally safe from plagiarism -- self-denial.
The Collected Works of G.K. Chesterton Volume 29: The Illustrated London News, 1911-1913