On: every psalm and song in the daily prayers uses today’s English. Off: all of them use the older “thee and thou”. Until you choose, the Songs of Zechariah, Mary and Simeon use today’s English, as most churches sing them. The Lord’s Prayer and the prayers for the dying show the form most people learned.
Against the Heavenly Prophets in the Matter of Images and Sacraments
Free elsewhere
Luther against Karlstadt, and the origin of his category of Schwärmerei (enthusiasm): the claim to have the Spirit apart from the external Word. The argument that shaped Lutheran suspicion of unmediated religious experience.