Beloved, I beg you as sojourners and pilgrims, abstain from fleshly lusts which war against the soul... 1 Peter 2:11
War: it causes death, scars, injuries, and shows us things that we were never created to see. I picture Peter taking his beloved friends by the shoulders and saying, "Friend, please, stop letting sin rule your life! You are causing immeausurable damage! I beg you!"
We are responsible to tell those we love when they are going against the Word of God. The flip side of that is that they are also responsible to tell us when we are walking in sin!