This is the post #30 of the Calvin's Institutes summary series.
In this chapter, Calvin argues from Scripture that those opinions about Christ that He was not quite human like us are completely wrong. From Scripture, Calvin seems to say something similar to Anselm, that Christ became one of us in order to redeem us, human beings. Yet, He was sinless. There were some opinions about Christ that His genealogy and titles (such as "son of man") were metaphorical or indicates that He was somehow different human being from us. Against this, Calvin argues that Christ was completely human (and God at the same time) except He was sinless. This sinlessness does not make Him any less human, for sin is not part of the human nature, but only the corruption of human nature.