“[I]ndividual orientation to the Church of the Lamb or to the great and abominable church is not by membership but by loyalty. Just as there Latter-day Saints who belong to the great and abominable church because of their loyalty to Satan and his life-style, so there are members of other churches who belong to the Lamb because of their loyalty to him and his life-style. Membership is based more on who has your heart than on who has your records.”

Stephen E. Robinson, 
“Warring against the Saints of God,” Ensign, Jan 1988, 34.
http://www.lds.org/ensign/1988/01/warring-against-the-saints-of-god?lang=eng