How does the devil operate on people who are serving God, sincerely trying to do the will of God? - Memorize this for life: Those who want to do God’s will, the devil causes them worries, anxieties, disturbs them, makes them anxious, disquiets their minds. Take this as a law of the spiritual life provided you sincerely want to do God’s will: Consider every anxiety, every worry, every disturbance, every desolation as a temptation. That statement is worth ten million dollars.
--Fr. John Hardon