The Spirit is given so that we ordinary mortals can become, in a measure, what Jesus himself was: part of God's future arriving in the present; a place where heaven and earth meet; the means of God's kingdom going ahead. The Spirit is given, in fact, so that the church can share in the life and continuing work of Jesus himself.
~ N.T. Wright, Simply Christian
When this is the nature of our faith and of our being in Christ how can we not be overwhelmed by both wonder and longing?