We all know that if you want a strong sturdy house to last for a long time you must have a mighty strong foundation. A week, sandy foundation is just going to wash away, and take your house too! So how do we get this nice, firm foundation?
Christ comes and teaches the people how to administer the sacrement and puts the cherry on top with this statement: "And I give unto you a commandment that ye shall do these things. And if ye shall always do these things blessed are ye, for ye are built upon my rock. But whoso among you shall do more or less than these are not built upon my rock, but are built upon a sandy foundation; and when the rain descends, and the floods come, and the winds blow, and beat upon them, they shall fall, and the gates of hell are ready open to receive them. Therefore blessed are ye if ye shall keep my commandments, which the Father hath commanded me that I should give unto you." 3 Nephi 18:12-14 pg 442.
So God gives us a commandment to partake of the sacrament "ye are built upon my rock." What better rock could we ever build on? Christ is all powerfull, all knowing, and perfectly loving! That is why He gave us the sacrament; becuase He loves us and wants us to recieve a 'remmission of our sins." What great joy that can bring to us! Take the sacrament which Christ gave us out of love and be clean that we may have His spirit to be with us. That is awesome!