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。

tbd

As far as knowing health's worth once you've lost it goes, that's the same thing with parents, water or air.

彼には彼女の忠告のありがたみが理解できなかった。

tbd

He could not comprehend the value of her advice.

随分尽くしてやったのに、それでも彼にはありがたみが無かった。

tbd

After all we had done, he was still ungrateful.

健康を失って初めて健康のありがたみがわかる。

tbd

People do not know the blessing of good health until they lose it.

健康の真のありがたみは健康を失ってはじめてわかる。

tbd

It is not till we lose our health that we realize its true value.

It's not till we lose our health that we realize its true value.

It isn't till we lose our health that we realize its true value.