我が身をつねって人の痛さを知れ
Meanings
1
pinch yourself and know others' pain; walk a mile in someone else's shoes
Proverb meaning you cannot truly understand another's suffering unless you experience something similar yourself. Often used to encourage empathy.
As the saying goes, 'Pinch yourself and know others' pain' — sometimes you only understand someone's suffering when you find yourself in the same position.