Matthew 16:12

non occ.: As the Lord had left the Pharisees on account of their unbelief, so now He teaches His disciples to be on their guard against their doctrine; whence it follows, "And when His disciples were come to the other side, they had forgotten to take bread."

They were bound to their Master with so great affection, that they were unwilling to part from Him for even a moment of time. And herein it should be observed how far they were from any longing for delicacies, when they took so small care for necessaries, that they had even forgotten to take bread, without which human weakness cannot support itself. "He said unto them, Take heed and beware of the leaven of the Pharisees and of the Sadducees."

Herein the Apostles are admonished not to be partakers in the doctrine of the Jews; for the works of the Law were established to produce faith, and to prefigure the things that were to follow; and they on whose times truth itself had chanced should look for no further types of truth; lest the teaching of the Pharisees, which knew not of Christ, should stay the effect of Gospel truth.

For he that takes heed of the leaven of the Pharisees and the Sadducees, does not observe the precepts of the Law and of the letter, and neglects the traditions of men that he may do the commandments of God. This is the leaven of which the Apostle speaks, "A little leaven leaveneth the whole lump." [1 Cor 5:6] By every means also we should avoid that leaven which Marcion, Valentinus, and all the heretics had. For the nature of leaven is such, that when mixed with flour, that which seemed a little increases to a large quantity, and brings the whole mixture to its own flavour. Thus heretical doctrine if it have cast but a small spark into your breast, in a short time a mighty flame is raised, and drives the whole temper of the man along with it.

Why did He not say plainly, Take heed of the doctrine of the Pharisees? Because He would remind them of those things that had been done in the multiplication of the loaves, knowing them to be forgetful. To have given them this charge at once bluntly would have seemed unreasonable; but to find fault with them on occasion banished by themselves prepared the way for the charge; therefore it is that the Evangelist brings forward their thoughts; "But they thought within themselves, saying, It is because we have taken no bread."

How had they no bread, seeing that as soon as they had filled seven baskets they entered into the boat, and came into the parts of Magedan? There they hear that they ought to take heed of the leaven of the Pharisees and Sadducees. But the Scripture is witness that they had forgotten to take the baskets with them.

Because the disciples still grovelled about Jewish observances, the Lord sharply rebukes them for the benefit of all; whence it follows, "But Jesus knowing their thoughts said unto them, O ye of little faith, why consider ye among yourselves because ye have no bread?"

ord.: As much as to say; Why do ye think that I spake of earthly bread, for which ye ought not to have a thought, having beheld Me of so little make such abundant overplus?

This He does that He may put away from them all care for food. But why did He not reprove them, when they said, "Whence should we have so much bread in the wilderness?" for that seemed a more fitting occasion. He did not blame them at that time that He might not seem to be by that urged on to do miracles, and He was unwilling to find fault with them before the people. Also there was more reason in the charge, when after two miracles of multiplication of loaves, they had anxiety about food. Observe with what mildness He rebukes them; He makes an excuse in answer Himself, saying, "Do ye not yet understand, nor remember the five loaves?"

interlin.: As much as to say, Do ye not understand the mystery, nor remember the miracle?

By this calling to mind what was past, and rousing their attention to what was to come.

Thus He takes this occasion to instruct them what is meant by the five loaves and the seven loaves, the five thousand and the four thousand, who were fed in the desert. For if the leaven of the Pharisees and Sadducees signified not earthly food, but corrupt traditions and heretical dogmas, why should not the food with which the people of God is nourished signify the true and uncorrupt doctrine?

But that you may learn what force Christ's reproof had upon His disciples, and how it roused their sluggish spirit, hear what says the Evangelist; "Then they understood how that he bade them not beware of the leaven of bread, but of the doctrine of the Pharisees and the Sadducees;" yet He had not interpreted this to them. This instruction of the Lord then drew them away from Jewish observances, and made them attentive instead of careless, and raised them out of their little faith, that whenever they should seem to have but little provision of bread they should have no fear about food, but should despise all those things.

107. Matthew proceeds: “And He left them, and departed. And when His disciples were come to the other side, they forgot to take bread. Then Jesus said unto them, Take heed, and beware of the leaven of the Pharisees and of the Sadducees;” and so forth, down to where we read, “Then understood they that He bade them not beware of the leaven of bread, but of the doctrine of the Pharisees and of the Sadducees.” These words are recorded also by Mark, and that likewise in the same order.

5. Because then, in order to understand the mystery of God, how Christ is both man and God, the heart must be cleansed: and it is cleansed by a good conversation, by a pure life, by chastity, and sanctity, and love, and by “faith, which worketh by love” (now all this that I am speaking of, is, as it were, the tree which hath its root in the heart; for it is only from the root of the heart that actions proceed; in which if thou plant desire, thorns spring forth; if thou plant charity, good fruit): the Lord, after that question which He had proposed to the Jews, when they were not able to answer it, immediately went on to speak of good actions, that He might show why they were unworthy to understand what He asked them. …