Know ye not that he was holy? But notwithstanding he being holy, he showeth unto the children of men that, according to the flesh he humbleth himself before the Father, and witnesseth unto the Father that he would be obedient unto him in keeping his commandments.
I was just reading this verse today when it caused me to reflect. Nephi is speaking of Christ’s baptism, and how despite being holy and needing no remission of sins, he got baptised as a gesture of humility and as a witness that he would keep the Father’s commandments. And of course what Christ did is an example to us too, for he “showeth unto the children of men the straitness of the path, and the narrowness of the gate, by which they should enter, he having set the example before them” (2 Nephi 31:9). I think this is not just talking about the gate of baptism, or just the immersion as it were, but the humility and witness of obedience tied in that act.
And of course, it’s tied in other acts too – the sacrament is likewise a witness that we are willing to keep the commandments and willing to take upon ourselves the name of Christ (see v.13; much of what is said about baptism in this chapter is replicated in the sacrament prayers). I guess I’d never really thought of the sacrament, properly partaken (“acting no hypocrisy and deception before God” as it were, v.13 again), as a act of humility. But it really is, I guess, if properly understood: we are showing that we desire to repent of all our sins, and keep God’s commandments (including participating in the sacrament), and eat and drink in remembrance of the body and blood of Christ who did for us what we can never do for ourselves.