Was Jesus Able to Sin?

This is a thorny question that has received more than one answer in history. Some Reformed authors like Sproul and Hodge have argued that Christ was not truly human if He was not subject to the possibility of falling into sin. Others have said that the unity of the God-man implies that the divine nature would have prevented the human nature from falling into sin. Both sides would agree that Jesus did not, in fact, sin. The question is whether it was possible or not.

I would argue that it was not possible for Christ to sin. However, this must be argued carefully. I would argue from the analogy of Christ’s sin-bearing that it was not possible for Christ to sin. How could Christ, as the God-man, bear the infinite weight of the punishment for sins? A mere human could not do so. Ursinus, in his commentary on the Heidelberg, argues that it is the divine nature which sustains the human nature in the sin-bearing. I would argue that Christ’s divine nature does the same with regard to withstanding temptation. Some versions of the position I hold wind up endangering the distinctiveness of Christ’s human nature. If we use the concept of sustaining, then we do not run the risk of attributing divine attributes to the human nature. This would be a more Lutheran communication of attributes that we should avoid. We can attribute characteristics of either nature to the person, but not human attributes to the divine, or vice versa.

Another way to get at the problem is to ask what kind of impossibility of sin are we positing? The impossibility I argue for is an impossibility of character. Not only was Christ’s human nature in the state of innocence, but also the divine nature sustained him in the temptations so that He would not fall into sin. This in no way minimizes the ferocity of the temptations directed Jesus’ way. Satan threw everything he had at Jesus. It is because Jesus resisted to the very last, to the very utmost heights of temptation, that he can be our Savior.