(Vere, Stein Atle. ©2011. "Comment: Your Fellow Is You". brakha.blogspot.com.)
Each human is free: an infinity of possibilities. The interrelationships among eachother invites each human to become an (unlimited) Open System, to move beyond the (limited) Closed System of ones own personal history, limitations, and expectations. The stranger is a surprise, someone beyond.
When the Tora (Vayikra 19:18) says, "And, you will love your fellow as you" ואהבת את רעך כמוך , your "fellow" companion is actually "you" yourself.
This "you" is your infinite self, the higher aspect of your self-identity, whose unlimited possibilities can encompass any identity of any human, who ever lived, lives, or ever will live.
The possibility for compassion חסד and altruism צדקה - to reach out to a stranger who you cant understand, to try see the world from someone elses point of view - is an encounter with your own infinite self.
When you and your stranger become fellows, by trusting eachother openly and striving to fulfill eachothers needs, this mutually unpredictable dynamic actualizes the infinite self that you and your fellow both share.
Loving your infinite self, is the only way humans have to actualize the love from God and to God.