To those who contend that the Spirit because He is called the Finger is less than the Father, St. Ambrose replies that this would also tend to the lessening of the Son, Who is called the Right Hand. That these names are to be referred only to the Unity, for which reason Moses proclaimed that the whole Trinity worked in the passage of the Red Sea. And, indeed, it is no wonder that the operation of the Spirit found place there, where there was a figure of baptism, since the Scripture teaches that the Three Persons equally sanctify and are operative in that sacrament.