From 1 John 1: 5-10. If we walk in the light of Jesus we will have fellowship with one another. The benefit of being “in the light”, in God, is fellowship with others, we will have relationships with other people. Without this – we will not get along with others or be isolated. The way for us to be in the light, and have better relationships with other humans is to confess our sins, and Jesus will purify us from ALL unrighteousness. So interestingly, one benefit of being real and honestly confessing is the resultant better relationships with other people.