Lambs were used as sin offerings. When John spoke these words he was essentially saying "look, here He is, the One God has provided as the sacrificial lamb to remove the sins of ALL of humanity". B. This would have been totally new for the Isrealites since the sin offering up until then was for individuals. When someone offered the sin offering it was for their sin only. Now John was saying that this Lamb was going to remove the sins of humanity once for all. This must have floored some.