No sin, especially no great sin, is just a harm done to the individual who commits it. I believe myself that the future of the human race is bound up with that idea. The soul that is conscious of a grievous sin is conscious of a great harm done to the community - to someone else. That common hurt should now be forgiven.
I grew up listening to AM radio in the '70s and hearing all of that great soul and rhythm and blues music, which definitely influenced the way I sing. But singing gospel has made me a much more humble person. There are so many people who were geniuses who only a few people knew about when they were alive.