Mormon continues to tie together the pieces of his argument. He gave the Spirit of Christ as the way to judge in verse 16 of this chapter, and now links any judgment call to the question of whether or not it might have been made in error. Since a good does not come but from the Spirit, the Spirit of Christ leads always to the good.
As Mormon concludes this section of the sermon, he has declared that good comes from God, and that we can find that good even in a confusing world by listening to the Spirit of Christ that has been given to every person. Now, at the end of this section, he realizes that our humanity at times places us in confusing circumstances. Only at this end of section do we get the restatement of the requirement “judge not, that ye be not judged.” Of course, Mormon’s reference would be to 3 Nephi 14:1, rather than to Matthew.