1 Corinthians 4:20

It is better for a man to be silent and be [a Christian], than to talk and not to be one. “The kingdom of God is not in word, but in power.” Men “believe with the heart, and confess with the mouth,” the one “unto righteousness,” the other “unto salvation.” It is good to teach, if he who speaks also acts. For he who shall both “do and teach, the same shall be great in the kingdom.” Our Lord and God, Jesus Christ, the Son of the living God, first did and then taught, as Luke testifies, “whose praise is in the Gospel through all the Churches.” There is nothing which is hid from the Lord, but our very secrets are near to Him. Let us therefore do all things as those who have Him dwelling in us, that we may be His temples, and He may be in us as God. Let Christ speak in us, even as He did in Paul. Let the Holy Spirit teach us to speak the things of Christ in like manner as He did.

The elements are worshipped, the air by Diogenes, the water by Thales, the fire by Hippasus; and by those who suppose atoms to be the first principles of things, arrogating the name of philosophers, being wretched creatures devoted to pleasure. “Wherefore I pray,” says the apostle, “that your love may abound yet more and more, in knowledge and in all judgment, that ye may approve things that are excellent.” “Since, when we were children,” says the same apostle, “we were kept in bondage under the rudiments of the world. And the child, though heir, differeth nothing from a servant, till the time appointed of the father.” Philosophers, then, are children, unless they have been made men by Christ. “For if the son of the bond woman shall not be heir with the son of the free,” at least he is the seed of Abraham, though not of promise, receiving what belongs to him by free gift. …

In Solomon, in Ecclesiasticus: “Be not hasty in thy tongue, and in thy deeds useless and remiss.” And Paul, in the first to the Corinthians: “The kingdom of God is not in word, but in power.” Also to the Romans: “Not the hearers of the law are righteous before God, but the doers of the law shall be justified.” Also in the Gospel according to Matthew: “He who shall do and teach so, shall be called greatest in the kingdom of heaven.” Also in the same place: “Every one who heareth my words, and doeth them, I will liken him to a wise man who built his house upon a rock. The rain descended, the floods came, the winds blew, and beat upon that house, and it fell not: for it was founded upon a rock. And every one who heareth my words, and doeth them not, I will liken him to the foolish man, who built his house upon the sand. …

Ver. 20 . “For the kingdom of God is not in word, but in power.” By signs, saith he, not by fine speaking, we have prevailed: and that our teaching is divine and really announces the Kingdom of Heaven we give the greater proof, namely, our signs which we work by the power of the Spirit. If those who are now puffed up desire to be some great ones; as soon as I am come, let them shew whether they have any such power. And let me not find them sheltering themselves behind a pomp of words: for that kind of art is nothing to us.

42. For they store up all the strength of their poisons in dialetical disputation, which by the judgment of philosophers is defined as having no power to establish aught, and aiming only at destruction. But it was not by dialectic that it pleased God to save His people; “for the kingdom of God consisteth in simplicity of faith, not in wordy contention.”

As also we remember that a dead man was raised to life by Abbot Macarius who was the first to find a home in the desert of Scete. For when a certain heretic who followed the error of Eunomius was trying by dialectic subtlety to destroy the simplicity of the Catholic faith, and had already deceived a large number of men, the blessed Macarius was asked by some Catholics, who were terribly disturbed by the horror of such an upset, to set free the simple folk of all Egypt from the peril of infidelity, and came for this purpose. …