Then what causes "fellowship to be broken" (I don't think it is) when you sin?
For example -
Gal 5:19 Now the works of the flesh are evident: sexual immorality, impurity, sensuality,
Gal 5:20 idolatry, sorcery, enmity, strife, jealousy, fits of anger, rivalries, dissensions, divisions,
Gal 5:21 envy, drunkenness, orgies, and things like these. I warn you, as I warned you before, that those who do such things will not inherit the kingdom of God.
But I think you know all that.