Dictionary / Vocabulary / 有り難み
ありがたみ
value; worth; virtue; blessing
Also written 有り難味、有難み、有難味、ありがた味
健康は失われて有難味がわかる点において、親や水・空気と同じようなものです。
As far as knowing health's worth once you've lost it goes, that's the same thing with parents, water or air.