In nature, all reactions want to end up at a lower energy level than they started in. The reason that Oxygen comes in molecules of two (O2) is because it costs less energy to hang out together than to go it alone. Some reactions require a catalyst. A catalyst lowers the energy necessary to get started, because sometimes it's just too much. Sometimes the catalyst is heat. Sometimes it is another molecule. Sometimes it is pressure. There are hundreds of examples.
Human nature is no different. Some things are relatively easy and require no real motivation. Like blinking. We don't require a reminder every few seconds that we need to blink; we simply do. But things that require faith sometimes require a catalyst. These motivations can come from anywhere. Sometimes, something is said to us that convinces us we need to change. Sometimes it is another person coming around who inspires you. Always, though, it is the still, small voice after all the wind and rending rocks. Because that's what all those other things are. Things to get us prepared to hear, and listen. We don't have to be as powerful as Elijah or as wise as Solomon in order to hear. And it doesn't matter what motivates us or whether we would have changed had it gone differently. What matters is that we do. Your body doesn't complain that you get your Vitamin C from oranges instead of cranberries. It doesn't care. It just knows that it has what it needs.
Heavenly Father always makes sure our spiritual bodies have what they need. Stop wondering about that. My favorite line from my favorite song says, "The Lord is on thy side." It's just a matter of whether you're on His.