From Matthew 12:31 “every kind of sin and slander can be forgiven, but blasphemy against the Spirit will not be forgiven.” An opinion: It is my understanding that Jesus mentioned this, because those people accused him wrongly. When a Christian calls out his Christian brother as a…. “slander” : ) it is forgiven. But if a Christian calls out his brother that his interpretation is of of the devil…is it blasphemy as well? I mean, this is on belief that all Christians have the spirit of Christ dwells in them. Similar to being unforgiving will not be forgiven… Matthew 6:15 That is: if I found someone (or even myself sometimes : ) in a "heretical" interpretation: we just disagree…. and ….avoid calling the other one unholy?