walk a mile in someone's shoes

From walk + a + mile + in + [possessive pronoun] + shoes. Originally, and still chiefly, found in admonitions not to judge a person until one has walked a mile in that person's shoes.

• "It's likely that he didn't begrudge what he had paid Marshall though, because he thought he had finally found a medical person who had walked a mile in his shoes."
• "Michael Poulin, associate professor at the State University of New York at Buffalo and colleagues showed in their 2017 study that an “imagine others” perspective leads to less stress than an “imagine self” perspective (i.e., walking a mile in someone else’s shoes)."

• the shoe is on the other foot
• which foot the shoe is on