The other night I sat watching my daughters play with a couple helium-filled balloons. As my daughters played with them, the helium inside slowly leaked out. At first the balloons stayed up on the ceiling but then over time they lost their lift and sank to the floor. The spiritual significance of this was striking. Before I write the spiritual, I'll focus on the physical.
Balloons are usually made out of rubber or plastic or latex. All of those materials, especially when stretched thin, are porous. Being porous, balloons will leak whatever is inside based on the principles of equilibrium (of pressure) and diffusion. Many balloons are filled with helium, which is the second "lightest" element. It diffuses through solids very quickly, up to 3 times faster than air, because it is a small and simple atom. This means that latex/plastic/rubber balloons filled with helium will deflate quite quickly.
We, spiritually, are like helium-filled balloons. Over time we start to deflate spiritually. Remaining pumped full of spiritual helium requires effort and recharging. If we slack off in our spiritual efforts and endeavors, we will lose our lift and sink slowly down. For a time, if we are connected and tied to others, their buoyancy can keep us afloat but not indefinitely. Eventually we will sag and hang down, deflated and dejected. To counteract this spiritual diffusion we need to actively recharge with new helium. We should do some of the soul-searching Alma did and asked his people to do.
"And now behold, I say unto you, my brethren, if ye have experienced a change of heart, and if ye have felt to sing the song of redeeming love, I would ask, can ye feel so now?
"Have ye walked, keeping yourselves blameless before God? Could ye say, if ye were called to die at this time, within yourselves, that ye have been sufficiently humble? That your garments have been cleansed and made white through the blood of Christ, who will come to redeem his people from their sins?" (Alma 5:26-27).
I'll repeat the key question: "If ye have experienced a change of heart...can ye feel so now?" Change once is not enough; conversion and salvation and exaltation take a lifetime of effort. We must seek daily for the Lord's mercy and grace to free us from our sins. We must fill our lives with goodness and good acts. We must endure to the end: "Wherefore, if ye shall press forward, feasting upon the word of Christ, and endure to the end, behold, thus saith the Father: Ye shall have eternal life" (2 Ne. 31:20). If we do not: "watch [ourselves], and [our] thoughts, and [our] words, and [our] deeds, and observe the commandments of God, and continue in the faith of what [we] have heard concerning the coming of our Lord, even unto the end of [our] lives, [we] must perish. And now...remember and perish not" (Mosiah 4:30).
In order to keep our spiritual balloons inflated and buoyant, we must remember what we have learned and endure to the end. We must continually fill our balloons with new helium in order to be lifted up at the last day.