Let the wisdom of John teach us how we live in Christ and Christ lives in us: The proof that we are living in him and he is living in us is that he has given us a share in his Spirit. Just as the trunk of the vine gives its own natural properties to each of its branches, so, by bestowing on them the Holy Spirit, the Word of God, the only-begotten Son of the Father, gives Christians a certain kinship with himself and with God the Father because they have been united to him by faith and determination to do his will in all things. He helps them to grow in love and reverence for God, and teaches them to discern right from wrong and to act with integrity.