These verses give the proper perspective of our relationship and responsibilities to Christ and our brothers and sisters in the church. Paul wrote this to confront a problem, judging and scorn, that was dividing the church. The counsel he gives fits our circumstances, and if used, it can go a long way toward solving many of our problems. He reminds us first to remember to whom we belong, why we belong to Him, and what responsibility this gives us. We belong to Christ because He died for us, rose from the grave, and now sits at the right hand of God, judging those the Father has called into His church.
We should be acutely aware of this, knowing we are being judged according to what we do. We are to strive with all our being to please Him by living as He lived, not to serve ourselves, but to serve Him and the church. Judging each other does not fall into our area of responsibility. Living according to the Sermon on the Mount does. If we do this, we will not cause any brother to fall. We appear not to be striving hard enough to please Christ, which is why we continue to split.
John W. Ritenbaugh
The Beatitudes, Part One: The Sermon on the Mount
Self-restraint and obedience to God's law is realized in outgoing concern for others that exceeds and rules over our own self-interest. Even lawful acts may on occasion cause other brethren to stumble or be made weak. Self-control provides the ability to resist what may cause pain to others. Thus, we exercise self-control for others, as well as for ourselves.
Martin G. Collins