like the all things having opposites, how could someone know a 100% happiness if they couldn't compare it with 100% sad. so, to be merely half happie, on a scale of 1 to 100, is a fine, fortunate, proper, gentle, and balanced rating.
time is too valuable to waste it being so happy.
we can't love or be too indulgent in this life, then we will lose it, like visiting the elves for three days, whilst the world turns and sun burns, and misplacing seven years.