As it was with our fathers, the Children of Israel, in their great exodus from Egypt, a Serpent, representing God, was raised up in their midst that whomsoever should look with faith in His coming would be saved. Now, Alma implied, to follow Christ's words is as easy for us to do as it was for them to offer that bit of reverence. A Way is prepared for us, just as a way was prepared for them, "and if we will look we may live forever."
In ending his instructions to Helaman, Alma enjoined him to take care of "these sacred things," and do as the Children of Israel did, "look to God and live." Preach the word of God unto the people, and be sober, which we may understand to mean, be longsuffering, be just, be patient, showing loving-kindness to all, be prayerful and diligent in every way.