(Isa. 48:12; Abr. 2:9–11; Deut. 32:7–9)
Called to what? Chosen for what? … Called into the Church, but chosen to be sealed up unto eternal life and to have one’s calling and election made sure.
(Bruce R. McConkie, Doctrinal New Testament Commentary, 3 vols. [Salt Lake City: Bookcraft, 1966–1973], 3:349.)
The phrase “my called” has reference to the foreordination given those born into the house of Israel to be the ministers of salvation to all other peoples of the earth (see Abraham 2:9–11; Deuteronomy 32:7–9).
(Joseph Fielding McConkie and Robert L. Millet, Doctrinal Commentary on the Book of Mormon, 4 vols. [Salt Lake City: Bookcraft, 1987–1992], 155.)
Isaiah decrees that Israel is God’s chosen people because they were called and foreordained by him in premortality to be such (see 1 Ne. 20:12, parallel to Isa. 48:12)—a doctrine reminiscent of instruction given to Israel through Moses in an earlier day (see, for example, Ex. 4:22).
(Andrew C. Skinner, Isaiah in the Book of Mormon, ed. Donald W. Parry and John W. Welch [Provo, Utah: Foundation for Ancient Research and Mormon Studies, 1998], 101.)