Today's first reading comes from 1 John 2. Two things the Apostle wrote impress me. (1) "Whoever keeps Jesus' word, the love of God is truly perfected in him. This is the way we may know that we are in union with him." So obedience to the word of Christ leads to union with him. (2) "Whoever says he is in the light, yet hates his brother, is still in the darkness." So whoever remains in the light of Christ does not hate anyone anymore. This is how we remains in peace. If you are still angry at a brother or sister, you are not yet walking in the light of Christ.