Receiving a testimony of the gospel and its specific principles is not a single event. It is something that happens repeatedly as our spirituality changes. We are familiar with Alma's analogy of faith, and thus a testimony, as a seed that we plant and care for as it grows. But once the seed becomes a tree do we stop nourishing it? Alma counseled:
. . . And now behold, after ye have tasted this light is your knowledge perfect?
Behold I say unto you, Nay; neither must ye lay aside your faith, for ye have only exercised your faith to plant the seed that ye might try the experiment to know if the seed was good.
And behold, as the tree beginneth to grow, ye will say: Let us nourish it with great care, that it may get root, that it may grow up, and bring forth fruit unto us. And now behold, if ye nourish it with much care it will get root, and grow up, and bring forth fruit.
But if ye neglect the tree, and take no thought for its nourishment, behold it will not get any root; and when the heat of the sun cometh and scorcheth it, because it hath no root it withers away, and ye pluck it up and cast it out.
Now, this is not because the seed was not good, neither is it because the fruit thereof would not be desirable; but it is because your ground is barren, and ye will not nourish the tree, therefore ye cannot have the fruit thereof.
And thus, if ye will not nourish the word, looking forward with an eye of faith to the fruit thereof, ye can never pluck of the fruit of the tree of life.
But if ye will nourish the word, yea, nourish the tree as it beginneth to grow, by your faith with great diligence, and with patience, looking forward to the fruit thereof, it shall take root; and behold it shall be a tree springing up unto everlasting life.
And because of your diligence and your faith and your patience with the word in nourishing it, that it may take root in you, behold, by and by ye shall pluck the fruit thereof, which is most precious, which is sweet above all that is sweet, and which is white above all that is white, yea, and pure above all that is pure; and ye shall feast upon this fruit even until ye are filled, that ye hunger not, neither shall ye thirst.
Then, my brethren, ye shall reap the rewards of your faith, and your diligence, and patience, and long-suffering, waiting for the tree to bring forth fruit unto you. (Alma 32:35-43).
Even after we gain a testimony of something, we must still work on keeping that testimony. President Eyring said, "I do not depend on what has happened in the past. To keep my living testimony of the Book of Mormon secure, I receive the promise of Moroni often. I don’t take that blessing of a testimony for granted as a perpetual entitlement."
Does that mean he doubts the truthfulness of the Book of Mormon and has to ask for a confirmation of it over and over? No. It means that he gains a deeper understanding and stronger testimony of the Book of Mormon.
We also must continually nuture our testimonies so they become more rooted and strong. And we will be blessed with knowledge, peace, and, in the end, eternal life.
Challenge: Nourish your testimony every day by reading the scriptures and other gospel resources, praying, and keeping the commandments.