This position will not be disputed, so long as it is admitted that the desire of reward is one of the strongest incentives of human conduct, or that the best security for the fidelity of mankind is to make their interest coincide with their duty. Even the love of fame, the ruling passion of the noblest minds…would on the contrary deter him from the undertaking, when he foresaw that he must quit the scene before he could accomplish the work . . .