If it is life, he is contented to live; and if it is death, as nature must have no further occasion for his presence here, he willingly goes where he is appointed.
 Adam Smith, The Theory of Moral Sentiments (1759). copy citation

Context

“Assured of the wisdom which directs all the events of human life, whatever lot befalls him, he accepts it with joy, satisfied that, if he had known all the connections and dependencies of the different parts of the universe, it is the very lot which he himself would have wished for. If it is life, he is contented to live; and if it is death, as nature must have no further occasion for his presence here, he willingly goes where he is appointed. I accept, said a cynical philosopher, whose doctrines were in this respect the same as those of the Stoics, I accept, with equal joy and satisfaction, whatever fortune can befall me. Riches or poverty, pleasure or pain, health or sickness, all is alike:” source