John 6:27

Which endureth to eternal life. This kind of food he calls incorruptible, and says that it endureth to eternal life, in order to inform us that our souls are not fed for a day, but are nourished in the expectation of a blessed immortality; because the Lord

commences the work of our salvation, that he may perform it till the day of Christ, (Philippians 1:6.)

For this reason we must receive the gifts of the Spirit, that they may be earnests and pledges of eternal life. For, though the reprobate, after having tasted this food, frequently reject it, so that it is not permanent in them, yet believing souls feel that enduring power, when they are made partakers of the power of the Holy Spirit in his gifts, which is not of short duration, but, on the contrary, never fails.

It is a frivolous exercise of ingenuity to infer, as some do, from the word labor or work, that we merit eternal life by our works; for Christ metaphorically exhorts men, as we have said, to apply their minds earnestly to meditation on the heavenly life, instead of cleaving to the world, as they are wont to do; and Christ himself removes every doubt, when he declares that it is he who giveth the food; for what we obtain by his gift no man procures by his own industry. There is undoubtedly some appearance of contradiction in these words; but we may easily reconcile these two statements, that the spiritual food of the soul is the free gift of Christ, and that we must strive with all the affections of our heart to become partakers of so great a blessing.

For him hath God the Father sealed. He confirms the preceding statement, by saying that he was appointed to us for that purpose by the Father. The ancient writers have misinterpreted and tortured this passage, by maintaining that Christ is said to be sealed, because he is the stamp and lively image of the Father. For he does not here enter into abstruse discussions about his eternal essence, but explains what he has been commissioned and enjoined to do, what is his office in relation to us, and what we ought to seek and expect from him. By an appropriate metaphor, he alludes to an ancient custom; for they sealed with signets what they intended to sanction by their authority. Thus Christ — that it may not appear as if he claimed anything of himself, or by private authority — declares that this office was enjoined on him by the Father, and that this decree of the Father was manifested, as if a seal had been engraven on him. It may be summed up thus: As it is not every person who has the ability or the right to feed souls with incorruptible food, Christ appears in public, and, while he promises that he will be the Author of so great a blessing, he likewise adds that he is approved by God, and that he has been sent to men with this mark, which is, as it were, God’s seal or signet

Hence it follows that the desire of those who shall present their souls to Christ, to be fed by him, will not be disappointed. Let us know, therefore, that life is exhibited to us in Christ, in order that each of us may aspire to it, not at random, but with certainty of success. We are, at the same time, taught that all who bestow this praise on any other than Christ are guilty of falsehood before God. Hence it is evident that the Papists, in every part of their doctrine, are altogether liars; for as often as they invent any means of salvation in the room of Christ, so often do they — by erasing, as it were, the impression which has been made — spoil and deface, with wicked presumption and base treachery, this seal of God, which alone is authentic. That we may not fall into so dreadful a condemnation, let us learn to keep pure and entire for Christ all that the Father has given to him.