Saint Theophan the Recluse. "What is spiritual life and how to tune into it?"
Be afraid of self-conceit, it is the first enemy. Our diligence before God, even only intentional, already gives rise to the thought of a certain difference from others and even from ourselves – the ones who we were in the past, especially when we manage to do something on this path. As soon as we stand for a while in this condition, it seems to be something marvelous, and we begin to dream of ourselves as perfect persons, doing wonderful things. And this is the enemy who tempts us in order to give rise to conceit. Whoever succumbs and falls into this conceit, is immediately abandoned by the grace, it leaves him alone. Then the enemy seizes him as a helpless prey.