1:29

the Lamb of God: After Jesus got baptized and returned from being tempted by the Devil, John the Baptist introduced him as “the Lamb of God.” This expression occurs only here and at Joh 1:36. (See App. A7.) Comparing Jesus to a lamb is fitting. Throughout the Bible, sheep were offered in recognition of sin and to gain approach to God. This foreshadowed the sacrifice that Jesus would make when he surrendered his perfect human life in behalf of mankind. The expression “the Lamb of God” could reflect a number of passages in the inspired Scriptures. In view of John the Baptist’s familiarity with the Hebrew Scriptures, his words may have alluded to one or more of the following: the male sheep that Abraham offered up instead of his own son Isaac (Ge 22:13), the Passover lamb that was slaughtered in Egypt for the deliverance of the enslaved Israelites (Ex 12:1-13), or the male lamb that was offered up on God’s altar in Jerusalem each morning and evening (Ex 29:38-42). John may also have had in mind Isaiah’s prophecy, where the one whom Jehovah calls “my servant” is said to be “brought like a sheep to the slaughter.” (Isa 52:13; 53:5, 7, 11) When the apostle Paul wrote his first letter to the Corinthians, he referred to Jesus as “our Passover lamb.” (1Co 5:7) The apostle Peter spoke of Christ’s “precious blood, like that of an unblemished and spotless lamb.” (1Pe 1:19) And more than 25 times in the book of Revelation, the glorified Jesus is spoken of figuratively as “the Lamb.”​—Some examples are: Re 5:8; 6:1; 7:9; 12:11; 13:8; 14:1; 15:3; 17:14; 19:7; 21:9; 22:1.

the world: The Greek word koʹsmos is closely linked with mankind in secular Greek literature and particularly so in the Bible. In this context as well as at Joh 3:16, koʹsmos refers to the entire world of mankind who are here described as being guilty of sin, that is, sin inherited from Adam.