2 Nephi 7

2 Nephi 7:4,8 The Lord God hath given me the tongue of the learned, that I should learn how to speak a word in season unto thee...And the Lord is near, and he justifieth me. Who will contend with me?...Let him come near me, and I will smite him with the strength of my mouth. This is an interesting thought, that either Isaiah or Christ (Isaiah could be speaking messianically at this point--several of the scriptures in between 4 and 8 are clearly references to Christ I gave my back to the smiter, and I was not rebellious, neither turned away back etc, although both of those verses could also be applied to Isaiah), one of them is basically saying, bring it on and I will destroy you with words. There is a verse somewhere in the old testament that says, He strengthens my arms to war that a bow of bronze is broken by my hands (or something similar). That one implies physical strength while this reference is clearly talking about rhetoric.

7:10 Who is among you that feareth the Lord, that obeyeth the voice of his servant, that walketh in darkess and hath no light? This is a great question: who loves the lord while walking in darkness? No one. You either love the Lord or you walk in darkness because if you love him, you keep his commandments, which means no walking in darkness.

2 Nephi 8:6-8 This one will take a minute to explain; Isaiah says, everybody on the whole earth shall wax old like a garment; and they that dwell therein shall die in like manner and then says that God's people should fear not the reproach of men because the moth shall eat them up like a garment, and the worm shall eat them up like wool but he just said that would happen to everybody! So he starts off by saying, everybody's gonna die, so don't be afraid of the wicked people, because they're going to die. But what? so are you, which we know, but what how is the fact that the wicked die supposed to change your mindset about their actions toward you? Perhaps it is supposed to remind you that there is no need for petty vengeance or anger at physical actions because eventually that person will die and then you'll both get what you deserve.