It is significant that when we partake of the sacrament we do not witness that we take upon us the name of Jesus Christ. We witness that we are willing to do so. The fact that we only witness to our willingness suggests that something else must happen before we actually take that sacred name upon us in the most important sense.
What future event or events could this covenant contemplate? The scriptures suggest two sacred possibilities, one concerning the authority of God, especially as exercised in the temples, and the other—closely related—concerning exaltation in the celestial kingdom. (Emphasis in original, "Taking upon Us the Name of Jesus Christ" Elder Dallin H. Oaks, Apr 1985)Later on, he says,
Willingness to take upon us the name of Jesus Christ can therefore be understood as willingness to take upon us the authority of Jesus Christ. According to this meaning, by partaking of the sacrament we witness our willingness to participate in the sacred ordinances of the temple and to receive the highest blessings available through the name and by the authority of the Savior when he chooses to confer them upon us.And again,
when we witness our willingness to take upon us the name of Jesus Christ, we are signifying our commitment to do all that we can to achieve eternal life in the kingdom of our Father. We are expressing our candidacy—our determination to strive for—exaltation in the celestial kingdom.Finally,
what we witness is not that we take upon us his name but that we are willing to do so. In this sense, our witness relates to some future event or status whose attainment is not self-assumed, but depends on the authority or initiative of the Savior himself.
Scriptural references to the name of Jesus Christ often signify the authority of Jesus Christ. In that sense, our willingness to take upon us his name signifies our willingness to take upon us the authority of Jesus Christ in the sacred ordinances of the temple, and to receive the highest blessings available through his authority when he chooses to confer them upon us.
There is power in the name of the Lord Jesus Christ. The power is to the sanctifying of our heart, mind and body. That we become holy, without spot. That we become his hands and feet to the serving of those around us. That we do what He would do if He were here. That we have the ability to preach by the power of the Holy Ghost that it might be delivered unto the hearts of the children of men. That those who will take in that teaching might benefit of the same eternal gift of life. And that we all are brought into his presence.
There are so many promises here. And it begins with the smallest of steps. Only to be willing to take upon us the name of the Son of God. Only to turn my heart and say, yes, I will do what is takes to receive the name of thy Son. To be His representative. To deliver the saving message and ordinances of the doctrine of Christ.