The Holy Spirit is a person like the Father and the Son, co-equal in the Godhead; but because His nature is less concrete (the word "spirit" means wind, after all), and the nature of His work, we are inclined to forget that He is God and an essential part of our salvation. Dr. Zeile's message helps bring the work of the Spirit into focus in this Pentecost message. The canticle of praise to the Holy Trinity, the Te Deum Laudamus fittingly follows this exposition of Christian teaching.