Um.. experimental mini-rant to follow. Just warning you...
Sin is anger, greed, hatred, attachment, materialism, jealousy, etc. Jesus never meant that he had literally come to relieve you of your sin with some magical free gift. He came to teach you how to relieve yourself of sin. He spoke of himself metaphorically, such that “he” was his message. Try it. Replace "I" with "my teaching" in some bible verses. That one tiny change makes the whole religion work so much better for me.
Sin is ego driven. Ego creates a personal/false reality bubble and thus it literally separates you from God (true nature of reality). The kingdom of God is within you and all around you. Purging sin is the path to awakening and finding that you are already standing in Eden(nirvana). Jesus taught self purification as the path to salvation and this whole “grace of God” business is the most obvious and naturally greedy human perturbation of a pure message that could be. To take a pure message and turn it into a manipulative pseudo-freebee is so very human.
So there, Jesus = Buddha.