Note 24 at Mt 5:48: Our goal and standard of conduct should always be perfection, even as God is perfect (Ge 17:1, Le 19:2, and 1Pe 1:15-16). It's always a mistake to use anyone or anything else as our standard (2Co 10:12). However, we cannot obtain sinless perfection through our efforts. Even the Apostle Paul had not obtained perfection (Php 3:12) but was still pressing toward the mark. We must trust the righteousness of God applied to us by faith and not our own righteousness (Php 3:9).