I'm Disciplined So That You May Not Be Condemned Along With the World

In verse 31, Paul says that if we judged ourselves truly, we would not be judged. But when we are judged by the lord, we are disciplined so that we may not be condemed along with the world. In other words, like god is disciplining them for what they've done to their fellow brothers and sisters. And even through their weakness and illness and even death, that is part of god's discipline.