Jesus also taught us to apply the doctrine in our lives: “If any man will do his will, he shall know of the doctrine, whether it be of God, or whether I speak of myself.”

In time, a personal witness will come and we will know—and know that we know. We will then be independent of all other worldly things, for “by the power of the Holy Ghost [we] may know the truth of all things” which are right and expedient for us. We will receive strength, comfort, and help to make good decisions and act with confidence in troubled times. – Allan F. Packer, “Finding Strength in Challenging Times!” Ensign (CR) May 2009