This is the best quote, and I use it often in my emails. We all have a battle going on in our lives. We might look good on the outside but, that is just our shell. If you remove the shell, you will find a heck of a lot of things you probably didn't want to see.
Don't judge before you can see all of a person. It is a work in progress and if you do it right you will learn to accept one another unconditionally.