In part three of this series we are reminded that the Holy Spirit is, apart from angels and from appearances of our Lord, God's only agent on earth. Without him we have no part of Christ. We only know the Father and the Son intimately through the Holy Spirit. Without him we can do nothing of spiritual value. He is powerful in our weakness which is the paradox of walking with Jesus. He gives us power to be witnesses for Jesus. When he fills us with joy that sharing of his love becomes natural in our interactions with others.