3:23 he gave us commandment. These two commandments are the most important of all, and they are “not grievous” (I John 5:3). In effect, they are essentially another way of stating the two commandments that Jesus said were the greatest of all—loving God and loving our neighbor (see Matthew 22:36-40).

3:24 he in him. See John 15:4,7,10. We are commanded to abide in Christ, and allow Him to abide in us. We are assured that this is real if we love His words and seek to obey them.

3:24the Spirit. Another assurance of salvation is the indwelling presence of the Holy Spirit (Romans 8:16-17).