"What a difference there is between our beginning and our end! The former in the frenzy of desire and the ecstasy of sensual pleasure; the latter in the destruction of all the organs and the musty odour of corpses. The path from birth to death is always downhill as regards well-being and the enjoyment of life; blissfully dreaming childhood, light-hearted youth, toilsome manhood, frail and often pitiable old age, the torture of the last illness, and finally the agony of death. Does it not look exactly as if existence were a false step whose consequences gradually become more and more obvious?"
January 1, 1970
https://en.wikiquote.org/wiki/Philosophical_pessimism