Beware, daughters, of a certain kind of humility suggested by the devil which is accompanied by great anxiety about the gravity of our sins.
He disturbs souls in many ways by this means, until at last he stops them from receiving Holy Communion and from private prayer by doubts as to whether they are in a fit state for it, and such thoughts as: ‘Am I worthy of it? Am I in a good disposition?I am unfit to live in a religious community. ‘
Thus Christians are hindered from prayer, and when they communicate, the time during which they ought to be obtaining graces is spent in wondering whether they are well prepared or no.
Everything such a person says seems to her on the verge of evil, and all her actions appear fruitless, however good they are in themselves. She becomes discouraged and unable to do any good, for what is right in others she fancies is wrong in herself.
When you are in this state, turn your mind so far as you can from your misery and fix it on the mercy of God, his love for us, and all that He suffered for our sake.
The Way of Perfection 39:1, 3