On the cross, Jesus cried out, "My God, My God, why hast Thou forsaken Me?"

It has been said that since the sin of the world was placed upon Jesus, that He became sin ...and the Father could not look upon sin, so turned away.  

Now, their is a lot of building that one does with this idea.  The Father and Son had never been separated ...is what most people would accept.  I can only imagine ...because all this is really too deep for me.  But, as we were created in His image ....I see the heart He has given me as a dad. And I would find it unbearable to watch the event of Him being whipped, beaten, nailed to the cross ... and the summation of all that torture and suffering.  I also see an act of God sparing that sort of pain in an account with Abraham.  I don't think God felt it would have been healthy for Abraham to lead Isaac to his death ....nor for Isaac's last memories to be of what his dad led him into.  As we see, God spared him that ...by providing a lamb.  

With Jesus being born a baby and becoming a man ...there was still the Father watching.  As a man, life is much different, but what wasn't different ...was that they continued to be One. Perhaps Jesus would not have died if the Father had not turned away.

Or it could be that, simply put ...sin is separation from God. The wages of sin is death.  And to die, Jesus had to be sin ...or be separated from the Father.