The History of Rasselas, Prince of Abyssinia by Samuel Johnson

At this time the sound of music proclaimed the hour of repast, and the conversation was concluded. The old man went away sufficiently discontented to find that his reasonings had produced the only conclusion which they were intended to prevent. But in the decline of life, shame and grief are of short duration: whether it be that we bear easily what we have borne long; or that, finding ourselves in age less regarded, we less regard others; or that we look with slight regard upon afflictions to which we know that the hand of death is about to put an end.

The Prince, whose views were extended to a wider space, could not speedily quiet his emotions. He had been before terrified at the length of life which nature promised him, because he considered that in a long time much must be endured: he now rejoiced in his youth, because in many years much might be done.