Everything good in life—every potential blessing of eternal significance—begins with faith. Allowing God to prevail in our lives begins with faith that He is willing to guide us. True repentance begins with faith that Jesus Christ has the power to cleanse, heal, and strengthen us.
President Russell M. Nelson, "Christ Is Risen; Faith in Him Will Move Mountains", General Conference, April 2021
Everything we do in life, if we want to gain eternal life in the world to come, starts with faith. It starts with believing that eternal life is, in fact, a possibility. It begins with trusting that Jesus Christ will do what He says He'll do if we show forth that faith, that effort.
We are here on earth for one reason. It is the second phase in Heavenly Father's Plan of Salvation. We successfully passed our first estate, otherwise we would not be here in the first place.
Now, our purpose is to gain a physical body and then learn to control that body and the appetites that come with it. Seems simple.
But it is anything but simple. Satan wants us to fail, like he did. So, he will do anything needed to distract us from our purpose. I mean anything. And, unfortunately, he has learned over thousands of years how to do that effectively and efficiently. We must FOREVER be on guard. We cannot let that guard down, even for a second.
But Satan uses trickery, distraction, misinformation, even our lack of knowledge, to get passed our guard, our armor. So, we must constantly be patching any holes, any gaps, in that armor.