expression
be kind to others; one good turn deserves another
Proverb meaning that kindness shown to others will eventually be returned to you.
人は情け、いつか自分に返ってくる。
Kindness to others will come back to you someday.
困っている人を助けるのは、人は情けというものだ。
Helping someone in need is what 'people are kindness' means.