After Adam and Eve were cast out of the Garden of Eden, an angel told them, "Wherefore, thou shalt do all that thou doest in the name of the Son, and thou shalt repent and call upon God in the name of the Son forevermore" (Moses 5:8).
When the brother of Jared became casual in his relationship with Deity, the Lord chastised him because "he remembered not to call upon the name of the Lord" (Ether 2:14). We can only imagine the wonderful lessons the brother of Jared must have learned during that three-hour discussion.
In our day the Lord has instructed priesthood holders to "exhort [members of the Church] to pray vocally and in secret" (D&C 20:47).