“Yet it pleased [satisfied, gratified] the Lord to bruise him”—this phrase has at least two possible interpretations: (1) “Lord” may be a reference to Elohim, the Father, thus teaching that this was a willing offering by the Father and the Son (John 3:16) or (2) Isaiah may be differentiating between the two roles of the Savior: it pleased Jehovah, the God of the Old Testament, to bruise Jesus, pointing to the fact that the great Jehovah would come in the person of Jesus and that they are, indeed, one God(compare Mosiah 15:2–4).
“When thou shalt make his soul an offering for sin he shall see his seed”—“his” and “he” in this verse are usually taken to mean Christ, while the pronoun “thou” is thought to refer to either God the Father or to those receiving the prophecy. In either case the message is the same for all: when one is forgiven of sins through the Atonement, one is spiritually begotten of Christ and becomes “his seed,” or child (compare Mosiah 15:10–12; D&C 84:36–38).
“He shall prolong his days”—Christ will be resurrected and become immortal.