mercy

sad; sadness; sorrow; grief

sad; sorrowful (literary)

phony mercy; sham benevolence; crocodile tears

extreme joy turns to sorrow (idiom); Don't celebrate too soon, things could still go wrong!

lit. if the rabbit dies, the fox grieves (idiom); fig. to have sympathy with a like-minded person in distress

vain regrets of old age (idiom)

not to become attached to material things, not to pity oneself

if you are lazy in your prime, you'll be sorry in your old age