Wilford Woodruff taught,

“The Lord never did nor never will send an angel to anybody merely to gratify the desire of the individual to see an angel. If the Lord sends an angel to anyone, He sends him to perform a work that cannot be performed only by the administration of an angel…I have never prayed for the visitation of an angel, but I have had the ministration of an angel several times in my life.”

Deseret Weekly News, Vol, 55, no. 21, Nov. 7, 1896