7 But if you incline to understand it of the house itself, where the feet of that house have stood; let your feet stand in Christ. They will then stand, if you shall persevere in Christ. For what is said of the devil? “He was a murderer from the beginning, and stood not in the truth.” The feet of the devil therefore stood not. Also what says he of the proud? “O let not the foot of pride come against me; and let not the hand of the ungodly cast me down. There are they fallen, all that work wickedness: they are cast down, and were not able to stand.” That then is the house of God, whose feet stand. Whence John rejoicing, says: what? “He that has the bride is the bridegroom: but the friend of the bridegroom stands and hears him.” If he stand not, he hears him not. Justly he stands, because “he rejoices on account of the bridegroom's voice.” Now therefore ye see why they fell, who rejoice because of their own voice. That friend of the Bridegroom said, “The same is He which baptizes.” Some say, We baptize: rejoicing in their own voice, they could not stand; and belong not to that house of which it is said, “where His feet stood.”
Source: The Enarrations, or Expositions, on the Psalms (New Advent)