St. Arsenios of Cappadocia used the Psalms for blessings, especially when there was no prescribed blessing for a particular occasion. Essentially, he arranged his psalter as a book of needs. For Psalm (Septuagint) 105 (KJV 106), it is suggested as a prayer for this purpose: “So that God gives illumination to people so that they do not move away from the way to salvation.” In short, it is a profound prayer against ecumenism. Let us say it aloud in full, petitioning the Lord: [here it is]