Did he write it in Jacobean English? After all, some historians believe his mom was British!
11 [18] All power . . . me: the Greek word here translated power is the same as that found in the LXX translation of Daniel 7:13-14 where one "like a son of man" is given power and an everlasting kingdom by God. The risen Jesus here claims universal power, i.e., in heaven and on earth.
12 [19] Therefore: since universal power belongs to the risen Jesus (Matthew 28:18), he gives the eleven a mission that is universal. They are to make disciples of all nations. While all nations is understood by some scholars as referring only to all Gentiles, it is probable that it included the Jews as well. Baptizing them: baptism is the means of entrance into the community of the risen one, the Church. In the name of the Father . . . holy Spirit: this is perhaps the clearest expression in the New Testament of trinitarian belief. It may have been the baptismal formula of Matthew's church, but primarily it designates the effect of baptism, the union of the one baptized with the Father, Son, and holy Spirit.
13 [20] All that I have commanded you: the moral teaching found in this gospel, preeminently that of the Sermon on the Mount (Matthew 5-7). The commandments of Jesus are the standard of Christian conduct, not the Mosaic law as such, even though some of the Mosaic commandments have now been invested with the authority of Jesus. Behold, I am with you always: the promise of Jesus' real though invisible presence echoes the name Emmanuel given to him in the infancy narrative; see the note on Matthew 1:23. End of the age: see the notes on Matthew 13:39 and Matthew 24:3.