Most of the acquaintance members of the LDS church have with Spencer W. Kimball as a public speaker comes from his prepared public addresses. He spoke at fifty-eight of the sixty-one general conferences of the Church held during his years as an Apostle (1943–73), missing only October 1948 after a heart attack and April and October 1957 after throat surgery. During most of his twelve years as President of the Church he spoke as many as five times at each conference. And he spoke several times at each of the many area conferences over which he presided. At BYU devotionals and on numerous other occasions he also spoke from prepared texts. But the bulk of his public speaking was extemporaneous.