We assume things all the time, even though it isn't usually smart. One of the things we assume, and assume quite naturally, is how good or bad someone is and if they will ever change. We look at others feel like we can tell whether or not they are the kind of person that God will end up forgiving or not. It is easy for us to see people and assume they are unforgivable, but is that accurate?
1 Corinthians 6:9-11
We need to assume others ARE forgivable.