“It is clearly apparent that there have been and now are many choice, honorable, and devoted men and women going in the direction of their eternal salvation who give righteous and conscientious leadership to their congregations in other churches. Joseph Smith evidently had many warm and friendly contacts with ministers of other religions. Quite a few of them joined the Church: Sidney Rigdon, John Taylor, Parley P. Pratt, and others in America and England. Some of them who carried the Christian attitude of tolerance did not join the Church. There are many others like them today.”

Source: “It’s a Two-Way Street”