Matthew 23:26

This discourse instructs us that we should hasten to become righteous, not to seem so. For whoso seeks to be thought so, cleanses the outside, and has care of the things that are seen, but neglects the heart and conscience. But he who seeks to cleanse that which is within, that is, the thoughts, makes by that means the things without clean also. All professors of false doctrine are cups cleansed on the outside, because of that show of religion which they affect, but within they are full of extortion and guile, hurrying men into error. The cup is a vessel for liquids, the platter for meat. Every discourse then of which we spiritually drink, and all speech by which we are fed, are vessels for meat and drink. They who study to set forth well wrought discourse rather than such as is full of healthful meaning, are cups cleansed without; but within full of the defilement of vanity. Also the letter of the Law and the Prophets is a cup of spiritual drink, and a platter of necessary food. The Scribes and Pharisees seek to make plain the outward sense; Christ's disciples labour to exhibit the spiritual sense.

He therefore is reproving those who, pursuing an ostentation of useless scrupulosity, neglected the discharge of useful morality. For it is the inside of the cup that is used; if that be foul, what profit is it to cleanse the outside? And therefore what is needed is purity of the inner conscience, that those things which are of the body may be clean without.

So, therefore, while with respect to alms He saith, "These ought ye to have done, and not to leave the others undone," touching purifications He speaks not on this wise, but what? "Ye make clean," He saith, "the outside of the cup and the platter, but within they are full of extortion, and injustice. Cleanse that which is within the cup, that the outside may be clean also." And He took it from a thing confessed and manifest, from a cup and platter. And besides, neither is it concerning a cup and platter he is speaking, but of soul and body, by the outside meaning the body, by the inside the soul. But if with regard to the platter there be need of that which is within much more with regard to thee. But ye do the contrary, saith He, observing things trifling and external, ye neglect what are great and inward: whence very great mischief arises, for that thinking ye have duly performed all, ye despise the other things; and despising them, ye do not so much as strive or attempt to perform them.

In different words, but to the same purport as before, He reproves the hypocrisy and dissimulation of the Pharisees, that they showed one face to men abroad, but wore another at home. He means not here, that their scrupulousness respecting the cup and the platter was of any importance, but that they affected it to pass off their sanctity upon men; which is clear from His adding, but inwardly ye are full of ravening and uncleanness.

Or, He means that the Jews whenever they were to enter the temple or to offer sacrifice, or on any festivals, used to wash themselves, their clothes, and their vessels, but none cleansed himself from his sins; but God neither commends bodily cleanliness, nor condemns the contrary. But suppose foulness of person or of vessels were offensive to God, which must become foul by being used, how much more does He not abhor foulness of conscience, which we may, if we will, keep ever pure? This He speaks not of the cup and platter of sense, but of that of the understanding, which may be pure before God, though it have never touched water; but if it have sinned, then though the water of the whole ocean and of all rivers have washed it, it is foul and guilty before God.