you have to be good to have fun. when you're good you get to have lots and lots of fun.
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Greedy/selfish characters grow and achieve - Hinata, Atsumu, Gojo telling Megumi to be more selfish, Haruka Inokuma from Chihaya, Shigure and Tohru greed to break the curse, Chika accepting his greed to play koto and the joys it gives him
Greed and selfishness can bring joy - greed that is disciplined creates results. To be disciplined is to be able to play. It brings freedom.
"Real generosity towards the future lies in giving all to the present."