How do we know who the Holy Spirit is? We do not hear the Spirit speak in the same way that God the Father or God the Son have spoken, yet its presence is equally here.
When Christ entered heaven, he took something with him: a human nature forged by the story of our striving and suffering. When Christ became man, God entered human history. When Christ returned to his Father, human history entered God.
A Homily for the Sixth Sunday of Easter, by Terrance Klein.
Like a possum playing dead, the Holy Spirit might not reveal his work in life until after the action has already taken place.