13. These things have I written unto you. As there ought to be a daily progress in faith, so he says that he wrote to those who had already believed, so that they might believe more firmly and with greater certainty, and thus enjoy a fuller confidence as to eternal life. Then the use of doctrine is, not only to initiate the ignorant in the knowledge of Christ, but also to confirm those more and more who have been already taught. It therefore becomes us assiduously to attend to the duty of learning, that our faith may increase through the whole course of our life. For there are still in us many remnants of unbelief, and so weak is our faith that what we believe is not yet really believed except there be a fuller confirmation.

But we ought to observe the way in which faith is confirmed, even by having the office and power of Christ explained to us. For the Apostle says that he wrote these things, that is, that eternal life is to be sought nowhere else but in Christ, in order that they who were believers already might believe, that is, make progress in believing. It is therefore the duty of a godly teacher, in order to confirm disciples in the faith, to extol as much as possible the grace of Christ, so that being satisfied with that, we may seek nothing else.

As the Papists obscure this truth in various ways, and extenuate it, they shew sufficiently by this one thing that they care for nothing less than for the right doctrine of faith; yea, on this account, their schools ought to be more shunned than all the Scyllas and Charybdises in the world; for hardly any one can enter them without a sure shipwreck to his faith.

The Apostle teaches further in this passage, that Christ is the peculiar object of faith, and that to the faith which we have in his name is annexed the hope of salvation. For in this case the end of believing is, that we become the children and the heirs of God.

14. And this is the confidence. He commends the faith which he mentioned by its fruit, or he shews that in which our confidence especially is, that is, that the godly dare confidently to call on God; as also Paul speaks in Ephesians 3:12, that we have by faith access to God with confidence; and also in Romans 8:15, that the Spirit gives us a mouth to cry Abba, Father. And doubtless, were we driven away from an access to God, nothing could make us more miserable; but, on the other hand, provided this asylum be opened to us, we should be happy even in extreme evils; nay, this one thing renders our troubles blessed, because we surely know that God will be our deliverer, and relying on his paternal love towards us, we flee to him.

Let us, then, bear in mind this declaration of the Apostle, that calling on God is the chief trial of our faith, and that God is not rightly nor in faith called upon except we be fully persuaded that our prayers will not be in vain. For the Apostle denies that those who, being doubtful, hesitate, are endued with faith.

It hence appears that the doctrine of faith is buried and nearly extinct under the Papacy, for all certainty is taken away. They indeed mutter many prayers, and prattle much about praying to God; but they pray with doubtful and fluctuating hearts, and bid us to pray; and yet they even condemn this confidence which the Apostle requires as necessary.

According to his will. By this expression he meant by the way to remind us what is the right way or rule of praying, even when men subject their own wishes to God. For though God has promised to do whatsoever his people may ask, yet he does not allow them an unbridled liberty to ask whatever may come to their minds; but he has at the same time prescribed to them a law according to which they are to pray. And doubtless nothing is better for us than this restriction; for if it was allowed to every one of us to ask what he pleased, and if God were to indulge us in our wishes, it would be to provide very badly for us. For what may be expedient we know not; nay, we boil over with corrupt and hurtful desires. But God supplies a twofold remedy, lest we should pray otherwise than according to what his own will has prescribed; for he teaches us by his word what he would have us to ask, and he has also set over us his Spirit as our guide and ruler, to restrain our feelings, so as not to suffer them to wander beyond due bounds. For what or how to pray, we know not, says Paul, but the Spirit helpeth our infirmity, and excites in us unutterable groans. (Romans 8:26.) We ought also to ask the mouth of the Lord to direct and guide our prayers; for God in his promises has fixed for us, as it has been said, the right way of praying.

15. And if we know. This is not a superfluous repetition, as it seems to be; for what the Apostle declared in general respecting the success of prayer, he now affirms in a special manner that the godly pray or ask for nothing from God but what they obtain. But when he says that all the petitions of the faithful are heard, he speaks of right and humble petitions, and such as are consistent with the rule of obedience. For the faithful do not give loose reins to their desires, nor indulge in anything that may please them, but always regard in their prayers what God commands.

This, then, is an application of the general doctrine to the special and private benefit of every one, lest the faithful should doubt that God is propitious to prayers of each individual, so that with quiet minds they may wait until the Lord should perform what they pray for, and that being thus relieved from all trouble and anxiety, they may cast on God the burden of their cares. This ease and security ought not, however, to abate in them their earnestness in prayer, for he who is certain of a happy event ought not to abstain from praying to God. For the certainty of faith by no means generates indifference or sloth. The Apostle meant; that every one should be tranquil in these necessities when he has deposited his sighs in the bosom of God.