"Could a greater miracle take place than for us to look through each other's eyes for an instant."
H.D. Thoreau

I think he means don't judge a person's life if you don't know what they've been through because you have to walk in their shoes to really know how it is to be them and how difficult it is. Sometimes people see others complaining about their lives and they say " Why are you complaining if you have a perfect life." Maybe that person doesn't like to talk about their life or show their emotions so you can't notice that this person has problems. You need to be them to know, you need to walk in their shoes to know what it is like to be them.

Giselly Gomes