And thus preaching through countries and cities, they appointed the first fruits [of their labors], having first proved them by the Spirit, to be bishops and deacons of those who should afterwards believe. Nor was this any new thing, since indeed many ages before it was written concerning bishops and deacons…. Our apostles also knew, through our Lord Jesus Christ, that there would be strife on account of the office of the episcopate. For this reason, therefore, since they had obtained a perfect foreknowledge of this, they appointed those [ministers] already mentioned, and afterwards gave instructions that when these should fall asleep, other approved men should succeed them in their ministry. – Letter to the Corinthians 42:4–5; 44:1–2 (70 A.D).

When You Have An Evil Thought, Do This! | St. Alphonsus Liguori
"When an evil thought is presented to the mind, we must immediately endeavor to turn our thoughts to God, or to something which is indifferent. But the first rule is, instantly to invoke the names of Jesus and Mary and to continue to invoke them until the temptation...