David O. McKay
"Oh Say, What Is Truth?"
According to President Thomas S. Monson, a favorite hymn of President David O. McKay was "Oh Say, What Is Truth?"
This hymn was written by an early Latter-day Saint missionary, John Jacques. Our Latter-day Hymns recounts:
"It is likely that John Jacques was weighed down many times by the hardships of his calling, but he took comfort in recalling the all-consuming and overriding value of the truth whose messenger he was. These words might well serve as a morale-building reminder to a discouraged missionary. If truth is really 'the brightest prize / To which mortals or Gods can aspire,' then it is worth any sacrifice."
Learn more in Our Latter-day Hymns: The Stories and the Messages.