We do best when we focus our attention upon our own thoughts and deeds rather than on the activities of those around us. We make far too many mistakes of our own to be concerned with the missteps of others.
We waste the limited time God has given us to be of service to others when we spend it measuring how well or poorly other people are doing. Besides, we judge merely by what we see with our eyes; we cannot see into the hearts of others as God can, does, and has the right to do.
We grow in God when our focus is solely upon Him and His will for us. It is far more profitable for us to spend our time doing the work God has given us to do, than it is trying to make the world around us conform to our way of thinking.