New Defender's Study Bible Notes
1:19 without spot. Under the Mosaic system, a temporary atonement (i.e., “covering”) could be obtained for forgiveness of sins by offering the blood of an unblemished and unspotted lamb (Exodus 12:5; Numbers 28:3). But this merely served as a type of the future offering of the blood of Christ, without contamination by either inherent sin or practiced sin. He would become “the Lamb of God, which taketh away the sin of the world” (John 1:29). The sinlessness of Christ is often affirmed in Scripture (e.g., II Corinthians 5:21; I Peter 2:22; I John 3:5; John 8:29).
1:20 foreordained. “Foreordained” (Greek proginosko) is the verb form of the noun (prognosis) better translated as “foreknowledge” in I Peter 1:2. Just as God foreknew that Christ would become the Savior, because the triune God had so ordained, so He also foreknew those who would be saved by Him.
1:20 foundation of the world. Before God ever created the world, in the mind of God, Christ had been sacrificed, and the names of the redeemed were known (see Ephesians 1:4; Revelation 13:8; 17:8; II Timothy 1:9).