No discipline is enjoyable while it is happening—it’s painful! But afterward there will be a peaceful harvest of right living for those who are trained in this way. Hebrews 12:11 (NLT)

Maintaining our boundaries can hurt others, but that is not the same as harming them. So being able to evaluate the consequences of our response to a situation is vital. Confronting those who would violate our boundaries can be painful (to us or to them), not unlike parental discipline, but as long as it doesn’t cause harm, good can come from it. In that way, we can bless others by maintaining our boundaries.