William Hazlitt said this quote

A man's life is his whole life, not the last glimmering snuff of the candle; and this, I say, is considerable, and not a little matter, whether we regard its pleasures or its pains. To draw a peevish conclusion to the contrary from our own superannuated desires or forgetful indifference is about as reasonable as to say, a man never was young because he has grown old, or never lived because he is now dead. The length or agreeableness of a journey does not depend on the few last steps of it, nor is the size of a building to be judged of from the last stone that is added to it. It is neither the first nor last hour of our existence, but the space that parts these two - not our exit nor our entrance upon the stage, but what we do, feel, and think while there - that we are to attend to in pronouncing sentence upon it.