When you go to the rock bottom, there is no way you can go further down. You have to come up. And that is what he said. He has gotten so bad that now he has to come back. And also to demonstrate that originally nobody is bad, it is only the action. The spirit is never bad. The spirit is always free and blissful.
Actions have a limited sphere and time. See if you do a bad act, you are not condemned forever. Even a punishment given to you is only for a few years or so. And even in those few years, you are treated well, isn’t it? A prisoner, whatever crime he has committed, is he treated badly? No, he is treated with compassion. The same thing was said in the Puranas – even a person who has gone to the highest level of crime, when he comes in contact with someone who is pure, someone who is so brilliant, someone who is full of positive energy then the influence of that positive energy is so powerful that it can bring light even to darkness.
See, in the darkest place a candle is good enough to bring light.