Who are you to pass judgment on the servant of another? It is before his own master that he stands or falls. And he will be upheld, for the Master is able to make him stand.
Romans 14:4 (RSV)
We all have this tendency to criticize others for their mistakes and what we consider a sin, even if sometimes it's something the Bible doesn't say anything about. Church members, for their part, do not only judge, they can even go so far as to condemn or reject their brethren in the faith.
What does the Bible tell us about this? The first thing is that we have all sinned at one time or another in our lives. And when that happens, we not only seek forgiveness from God, we even want others to forget what we have done wrong. So in that sense, the Bible is clear that judging others is not always a good thing to do, unless our judgment is a call to repentance.
This verse teaches us today that it is not for us to judge others for their sin because, just like David, God can sustain and make them stand. Often, God uses our mistakes or a sin to bring us into deep intimacy with Him. Let us not judge God's elect, but when we see them committing sins, it is always wiser to exhort them all as Jesus commands us to do in Matthew 18. For, we will be judged with the same judgment that we have judged others.