This section is the first of three revelations given as church leaders were in "partial seclusion" for fear of persecution. I have to wonder if the vague terms the section header uses to refer to the persecution is a way of softening up the audience for later.
Behold, thou wast called and chosen to write the Book of Mormon, and to my ministry;
But if they receive thee not, I will send upon them a cursing instead of a blessing.
It's a little weird that a prophecy from an omniscient god contains what basically amounts to an if/then/else statement. Doesn't God know damn well what's going to happen? He shouldn't need to qualify his prophecies or cover his bases like this—but a charlatan would need to.
And in temporal labors thou shalt not have strength, for this is not thy calling. Attend to thy calling and thou shalt have wherewith to magnify thine office, and to expound all scriptures, and continue in laying on of the hands and confirming the churches.
And it shall come to pass that whosoever shall lay their hands upon you by violence, ye shall command to be smitten in my name; and, behold, I will smite them according to your words, in mine own due time.
This is a disconcerting clarification God adds at the end here. If someone physically attacks you, God's got your back, but probably not right away. But after you've been tarred and feathered and beaten to a pulp, two weeks later, in his own due time, BAM—God's gonna smite the shit outta that guy. Bummer about the broken teeth and the cracked ribs, but Heavenly Father works on his own timeline.
Isn't he a great deity to have in your corner?