After understanding that the gospel is build upon the mission of Christ, it should be no surprise that our relationship to the gospel is built upon our acceptance of that atoning mission. Thus for us, the gospel is one of repentance and baptism. We are built upon the solid foundation that Christ built when he performed his glorious atonement in our behalf.
Reference: The phrase “…baptized in my name shall be filled” may be a reference to the Beatitudes as given in the Savior’s visit to the Bountiful saints:
3 Nephi 12:6
6 And blessed are all they who do hunger and thirst after righteousness, for they shall be filled with the Holy Ghost.
With this reference to the nature of what will do the “filling,” we have baptism and the Gift of the Holy Ghost as both important aspects of our foundation in the gospel of Christ.