Psalms 48:4

2. But will not He who at first came con cealed, because humble, come again manifested, because exalted? You have just listened to the Psalm: “God shall come manifestly, and our God shall not keep silence.” He was silent that He might be judged, He will not be silent when He begins to judge. It would not have been said, “He will come manifestly,” unless at first He had come concealed; nor would it have been said, “He shall not keep silence,” unless He had first kept silence. …

4. And what is it they are now to hear? “My mouth shall speak of wisdom, and the meditation of my heart understanding” ( ver. 3 ). And this repetition is perhaps made, lest perchance if he had said only “my mouth,” thou shouldest suppose that one spake to thee who had understanding but in his lips. For many have understanding in their lips, but have not in their heart, of whom the Scripture saith, “This people honoureth me with their lips, but their heart is far from me.” What saith he then who speaketh to thee? when he hath said, “My mouth shall speak of wisdom,” in order that thou mayest know that what is poured forth from the mouth floweth from the bottom of the heart, he hath added, “And the meditation of my heart of understanding.”

11. And first of all, let us discipline our tongue to be the minister of the grace of the Spirit, expelling from the mouth all virulence and malignity, and the practice of using disgraceful words. For it is in our power to make each one of our members an instrument of wickedness, or of righteousness. Hear then how men make the tongue an instrument, some of sin, others of righteousness! “Their tongue is a sharp sword.” But another speaks thus of his own tongue: “My tongue is the pen of a ready writer.” The former wrought destruction; the latter wrote the divine law. Thus was one a sword, the other a pen, not according to its own nature, but according to the choice of those who employed it. For the nature of this tongue and of that was the same, but the operation was not the same. And again, as to the mouth likewise, we may see this same thing. …

6. Therefore the righteous and faithful servants of the Lord, who ‘are made disciples for the kingdom of heaven, and bring forth from it things new and old;’ and who ‘meditate on the words of the Lord, when sitting in the house, when lying down or rising up, and when walking by the way;’, since they are of good hope because of the promise of the Spirit which said, ‘Blessed is the man that hath not walked in the counsel of the ungodly, nor stood in the way of sinners, nor sat in the seat of corrupters; but his delight is in the law of the Lord, and in His law doth he meditate day and night;’, being grounded in faith, rejoicing in hope, fervent in spirit, they have boldness to say, ‘My mouth shall speak wisdom, and the meditation of my heart shall be of understanding.’ And again, ‘I have meditated on all Thy works, and on the work of Thy hands has been my meditation.’ And, ‘If I have remem …