The address returns to emphasize the audience. As in verse 1, the audience is "ye that know righteousness." The Lord summarily defines who these people are. In earlier verses he identified them, and reminded them of their covenantal position with him, but in this case the Lord specifically defines them as "the people in whose heart I have written my law." These are opposed to the hypocrites of 2 Nephi 7:11.
The Lord's people are not those who simply show the exterior signs of righteousness (who walk by their own light 2 Nephi 7:11) but those in whose soul the law is infused. Such people, who have internalized God's law and principles, need not fear "the reproach of men." They may be confident in their knowledge that they are following their God, and can withstand the derision, the "revilings" of men that might come because they follow a different way that those who would revile them.