Ezekiel saw a valley of dry bones and is told to preach to the Spirit/Wind/Breath. The point is that God's people will be brought back, despite their reduction to bones and dust. And it is the Holy Spirit, the Wind or Breath of God that will awaken us on the Last Day.  This Pentecost message is accompanied by the Confessional rite, Introit, and Kyrie, the Nicene Creed and the hymn, O Day of Joy and Gladness."