No matter how serious the trial, how deep the distress, how great the affliction, [God] will never desert us. He never has, and He never will. He cannot do it. It is [against] His character [to do so]. He is an unchangeable being. … He will stand by us. We may pass through the fiery furnace; we may pass through deep waters; but we shall not be consumed nor overwhelmed. We shall emerge from all these trials and difficulties the better and the purer for them, if we only trust in our God and keep His commandments.
President George Q. Cannon as quoted by Elder Jeffrey R. Holland in General Conference, October 1997, "He Hath Filled the Hungry with Good Things"
We, as mortals, change all the time. One minute, we are ecstatic and overjoyed with a richness of blessings and happiness. The next minute, we are stressed and weighed down with the difficulties of life. We are ever changing.
Because we are constantly riding the highs and lows of life, like a variable roller coaster, we cannot possibly understand how God Himself doesn't change. He cannot change. He does not peak and valley with His emotions, with His feelings, or with His determination. He is constant.
So, I take huge comfort knowing this. He will always and constantly stand with me as I go through life's ups and downs. I go up, He is there. I tumble down, He is there. He will never forsake or desert me, no matter where I am on the path. He doesn't play favorites. He loves me just as much as He loves President Nelson.
Throughout the difficult times in life, the Lord is literally with me. I don't know how but I know He is. Like the poet said in the poem Footprints, "When you see only one set of footprints... it was then that I carried you".
I testify that when our burdens are too hard to bear, He will lift us and carry us, as well as shoulder our burdens and make them lighter. We only need to reach out for Him. He will not circumvent our agency. He cannot.