A testimony is a priceless gift from God. But even though a person may receive a witness through the Holy Ghost, there is no guarantee that this testimony will remain steadfast unless the person exerts constant effort to keep that testimony alive. Testimonies gained may be lost through carelessness, indifference, and/or neglect. – Henry D. Taylor, “Man Cannot Endure on Borrowed Light,” Ensign (CR), June 1971, p.108