Dear brothers and sisters, if another believer is overcome by some sin, you who are godly should gently and humbly help that person back onto the right path. And be careful not to fall into the same temptation yourself. Galatians 6:1 NLT
In this one verse, Paul reminds us of several things:
People are sometimes overcome by sin
People sometimes need help overcoming sin (they may be unaware of the sin).
People living in community with one another should lovingly help one another overcome sin.
People help one another overcome sin by gently and humbly helping them back onto the right path (which is very different from declaring the current path to be right).
People helping one another overcome sin must be careful to avoid being tempted by sin.
All of this requires honesty, humility, and vulnerability in our relationships. In other words, it requires real love. It requires relationships where we love people enough to tell them the truth, and they love us enough to tell us the truth. In such a relationship, truth is expressed, not to condemn one another, but to lift one another up.