6 “For this shall every one that is holy pray unto You in an acceptable time:” for this wickedness of heart shall every one that is righteous pray unto You. For not by their own merits will they be holy, but by that acceptable time, that is, at His coming, who redeemed us from sin. “Nevertheless in the flood of great waters they shall not come near him”: nevertheless, let none think, when the end has come suddenly, as in the days of Noah, that there remains a place of confession, whereby he may draw near unto God.
Source: The Enarrations, or Expositions, on the Psalms (New Advent)