You will come to feel light growing in your life

If you can look forward to such a day with enough desire born of testimony, you will be strengthened to resist the temptations of the world. Each time you choose to try to live more like the Savior, you will have your testimony strengthened. You will come in time to know for yourself that He is the Light of the World.
You will come to feel light growing in your life. It will not come without effort. But it will come as your testimony grows and you choose to nurture it. Here is the sure promise from the Doctrine and Covenants: “That which is of God is light; and he that receiveth light, and continueth in God, receiveth more light; and that light groweth brighter and brighter until the perfect day.”12 Doctrine and Covenants 50:24
Author/Source: A Living Testimony By President Henry B. Eyring First Counselor in the First Presidency