Theophylact here expresses the following opinion. The Lord, condescending to the weakness of human nature and to the imperfection of His disciples at that time, before the Ascension, taught them to ask God that they not enter into temptation.
But when He had ascended, weak human nature was strengthened by the knowledge of the Resurrection and the Ascension, by strong grace, and by the coming of the Holy Spirit. Then His reputed brother, this James, proclaims here to Christians that they should not fear temptations.
Therefore the one who endures them is blessed, and it will be well for him. So it is written in Job: "Blessed is the man whom God reproves; do not reject the chastening of the Almighty. For He causes pain and restores again; He strikes, and His hands heal" (Job 5:17-18).
The Lord also called blessed those who endure reproaches, persecutions, and false accusations for His name, saying, "Blessed are those who are persecuted for righteousness' sake, for theirs is the Kingdom of heaven" (Mt 5:10).
And again: "Blessed are you when they revile you and persecute you, and say every evil word against you falsely for My sake" (Mt 5:11).
If you, O Christian, endure with thanksgiving the temptations that come upon you by God's permission because of your sins, you will pay your debt, fulfill your penance, and receive forgiveness.
But if you endure the other kind of permission, which comes only as a trial from God, you will receive from Him a crown and praise, like Job and Abraham, according to Oecumenius.
Concerning this crown which the Lord promised, Zechariah writes: "And the crown shall be for those who endure, who are useful to Him, and who have understood Him" (Zech 6:14). That is, those useful in endurance, and those who have understood this endurance, as Saint Metrophanes interprets the saying.
Paul also says that God "will render to each one according to his works: to those who by patience in good work seek glory, honor, and incorruption, eternal life" (Rom 2:6-7).
The divine Cyril also cites this saying of the brother of the Lord: "As preeminence in battles bears witness to the courage of the fighter, so also the capacity to endure very easily the labors that come from temptation shows one strong and vigorous for the struggle in virtue pleasing to God.
"It shows him glorious, worthy of admiration, and filled with every praise. So the disciple of the Savior assures us that such a one will always and necessarily be an object of wonder, saying: 'Blessed is the man who endures temptation, for when he has been tested, he will receive the crown of life'" (Glaphyra on Exodus, book 3).