(liberating, transforming) power of Christ....
Wow...so the word "need" is a tough one. I think I often feel like I don't "need" anyone, or that I shouldn't "need" anyone, but of course this is stupid.
And stupid is not helpful.
But really, I think the heart of this addiction issue is the stubborn inability to acknowledge that I might need something at all. The addiction is all I "need," or at least that is what I tell myself when I act out, when I rationalize my behavior, when I refuse to do the things I know will help.
But the truth is I do need the Savior. In fact, his healing power is the only way to overcome my addiction. The power of Christ is liberating.
The rest the savior is talking about is the rest for our souls. And it is sin that makes our souls tired. We labor under its burden and we are heavy laden with guilt, shame, insecurity, doubt, and worry. The atonement gives us rest from those feelings, repentance frees us from the oppression of sin and invigorates us with the power and sanctifying influence of the Holy Ghost. We are literally transformed by the atonement because we become receptacles of light.
So what about learning of the Savior. he says "take my yoke upon you." This means that we are to convert and live the disciples life. We covenant to serve and sacrifice and be obedient. And such obedience qualifies us for the companionship and cleansing influence of the Holy Ghost.
Interesting that he commands us to learn of him, and the reason is that he is meek and lowly of heart. Meekness and humility--a willingness to sacrifice our own wills--are requisite for conversion and discipleship.
So he is saying that he we should take his yoke upon ourselves and that in order to that succesfully we should learn of him and do likewise.
So learn of the Savior and do his will. This is the Gospel plan for freeing us from sin.