On our last reading, Mark pointed out something interesting in verse 18. (Well, a few things, actually.) He noted that "you will call me 'my man'" could be either a command or a description of the future. English uses "you will verb" generally as a future tense, and usually forms a command by simply offering the commanded verb--in this case, "call me 'my man'" without "you will." However, to intensify the command, those future-tense words can go back in there: "You WILL call me 'my man.'"