Judas and Peter

A friend asked what the difference between Judas and Peter was given that both deserted Jesus, but one hung himself and the other became a pillar of the church.

The short answer is the unmerited grace of God, but was there any difference in their actions?

I promised I'd email some quotes from the Reformers for him. Here they are for what it's worth.

They [i.e. the Roman Catholics] teach that by contrition we merit grace. In reference to which, if any one should ask why Saul and Judas and similar persons, who were dreadfully contrite, did not obtain grace, the answer was to be taken from faith and according to the Gospel, that Judas did not believe, that he did not support himself by the Gospel and promise of Christ. For faith shows the distinction between the contrition of Judas and of Peter. But the adversaries take their answer from the Law, that Judas did not love God, but feared the punishments. Is not this teaching uncertain and improper things concerning repentance? When, however, will a terrified conscience, especially in those serious, true, and great terrors which are described in the psalms and the prophets, and which those certainly taste who are truly converted, be able to decide whether it fears God for His own sake out of love it fears God, as its God, or is fleeing from eternal punishments? These people may not have experienced much of these anxieties, because they juggle words and make distinctions according to their dreams. But in the heart, when the test is applied, the matter turns out quite differently, and the conscience cannot be set at rest with paltry syllables and words. These great emotions can be distinguished in letters and terms; they are not thus separated in fact, as these sweet sophists dream. Here we appeal to the judgments of all good and wise men who also desire to know the truth. They undoubtedly will confess that these discussions in the writings of the adversaries are very confused and intricate. And nevertheless the most important subject is at stake, the chief topic of the Gospel, the remission of sins. This entire doctrine concerning these questions which we have reviewed, is, in the writings of the adversaries, full of errors and hypocrisy, and obscures the benefit of Christ, the power of the keys, and the righteousness of faith to inexpressible injury of conscience [...]

faith [in Christ] shows the distinction between the contrition of Judas and Peter, of Saul and of David. The contrition of Judas or Saul is of no avail, for the reason that to this there is not added this faith, which apprehends the remission of sins, bestowed as a gift for Christ's sake. Accordingly, the contrition of David or Peter avails, because to it there is added faith, which apprehends the remission of sins granted for Christ's sake.

(Philip Melanchthon, The Defense of the Augsburg Confession, Article XII (V): Of Repentance)

They [e.g. Philip Melanchthon] give Cain, Saul and Judas, as examples of legal repentance. Scripture, in describing what is called their repentance, means that they perceived the heinousness of their sins, and dreaded the divine anger; but, thinking only of God as a judge and avenger, were overwhelmed by the thought. Their repentance, therefore, was nothing better than a kind of threshold to hell, into which having entered even in the present life, they began to endure the punishment inflicted by the presence of an offended God. Examples of evangelical repentance we see in all those who, first stung with a sense of sin, but afterwards raised and revived by confidence in the divine mercy, turned unto the Lord. Hezekiah was frightened on receiving the message of his death, but praying with tears, and beholding the divine goodness, regained his confidence. The Ninevites were terrified at the fearful announcement of their destruction; but clothing themselves in sackcloth and ashes, they prayed, hoping that the Lord might relent and avert his anger from them. David confessed that he had sinned greatly in numbering the people, but added "Now, I beseech thee O Lord, take away the iniquity of thy servant." When rebuked by Nathan, he acknowledged the crime of adultery, and humbled himself before the Lord; but he, at the same time, looked for pardon. Similar was the repentance of those who, stung to the heart by the preaching of Peter, yet trusted in the divine goodness, and added, "Men and brethren, what shall we do?" Similar was the case of Peter himself, who indeed wept bitterly, but ceased not to hope...Though all this is true, yet the term repentance (in so far as I can ascertain from Scripture) must be differently taken [Calvin was much more concerned with words in systematics corresponding with the biblical usage].

(John Calvin, Institutes 3.3.4-5)