knowing yourself

In response to Ross... I think that he states you can know yourself in the way that even though you are constantly changing with the passing of time, you can have similar experiences that can relate you to the previous you.  As his example of the two mothers suffering the loss of a child from very different backgrounds may know each other better than someone that is more "like" them not experiencing that loss.  Similar experiences are more important than like backgrounds in knowing someone.  Maybe?