善 morally good

ZEN Buddhism is morally good.

You can feel all the more morally good about criticizing the conformist sheep.

improve ★★☆☆☆
改 (renew / improve) + 善 (morally good) = 改善 (improve)

improve a thing - your performance in Math class / the economy / the efficiency of the car

a virtuous person ☆☆☆☆☆
善 (morally good) + 人 (person) = 善人 (a virtuous person)