True conversion comes through the power of the Spirit. When the Spirit touches the heart, hearts are changed. When individuals, both members and investigators, feel the Spirit working with them, or when they see the evidence of the Lord’s love and mercy in their lives, they are edified and strengthened spiritually and their faith in Him increases. These experiences with the Spirit follow naturally when a person is willing to experiment upon the word. This is how we come to feel the gospel is true.... A most significant evidence of our conversion and of how we feel about the gospel in our own lives is our willingness to share it with others and to help missionaries find someone to teach.

M. Russell Ballard, “Now Is the Time,” Ensign, Nov 2000, 75–77 [emphasis added]