“And now, I would ask of you, my beloved brethren, wherein the Lamb of God did fulfill all righteousness in being baptized by water? 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.”
He was flesh. He was mortal. He could (and did) die. Though death could not claim Him, He was to die. Baptism is the great symbol of death and resurrection, and He is the resurrection. He lived the symbol as well as the reality, so all others could have part in that victory. The symbol to point the way. The reality to open the way. We are in turn “shown the way” by what He did.
He also “witnesses” before “the Father that he would be obedient unto Him.”
Think about the command of understanding Nephi is exhibiting here. He is telling us that Christ’s mortal ministry would include these very specific events for these very specific reasons. This was what he was permitted to tell us. What other information was within his knowledge which he was forbidden from sharing? Does this level of understanding by Nephi tell you something about what can be learned from the Lord if you are diligent in following His path? Why, if you can see what may be available, would you not be willing to do whatever is asked of you in order to receive something similar in your own life?