Whenever the malign demon he sees that we walk directly towards virtue, he attacks us with the fourth deception proposed above. This consists in various good desires that he excites in us, that we might fall from the practice of virtue into vice.
Consider a person who finds herself in poor health, but bears her infirmity with a patient will all the same. The clever adversary, knowing she can thus acquire the habit of patience, places before her many good works that she could accomplish in a different state of health. He makes an effort to convince her that, were she healthy, she could serve God better by being useful to herself and even to others. Having set this desire into motion within her, he gradually increases it little by little. She finds herself troubled by the fact that she cannot effect her will; as her desires grow greater and stronger within her, so grows her disquiet. The enemy uses this to lead her, slowly and ably, to impatience with her infirmity, until she no longer considers it an infirmity but an obstacle to those works that she anxiously longs to effect for the greater good. Having goaded her to this point, the demon just as readily strips from her mind the goal of divine service and of good works, leaving her with the bare desire to free herself from infirmity. As it does not go according to her will, she becomes so upset as to lose her patience completely. In this manner, she falls unawares from the virtue that she formerly exercised into the opposite vice. How does one guard against this deception and oppose it? When you find yourself in some tormented state, be careful to leave no room for the desire of some good work that unsettles you because you cannot now perform it. In this, you must accept with complete humility, patience, and resignation the fact that your desires would not have the effect you imagine, for you are viler and more unstable than you fancy. Or consider how God, in his hidden judgment, or due to your unworthiness, wishes not to receive that good from you, but rather that you lower yourself and humble yourself patiently beneath his sweet and powerful hand (see 1 Peter 5.6). In the same way, if your spiritual father or some other cause impedes you from carrying out your devotions when you want, especially from receiving holy communion, do not allow your desire for these things to trouble or upset you. Rather, stripped of your every possession, clothe yourself in your Lord’s approval. Say to yourself, “If the eye of divine providence did not see ingratitude and defects within me, I would not now be unable to receive the most holy sacrament. However, I see that my Lord reveals my unworthiness to me in this manner. May he be praised and blessed for ever! In truth, my Lord, I trust in your supreme goodness. Grant that I open my heart to your every will, obeying and taking pleasure in all things. See to it that I agree with you and please you in everything. Open my heart to you, disposing it to your every will, so that you enter it spiritually and console and strengthen it against those enemies who seek to distance it from you. In this way, may everything that is good to your eyes be done. My Creator and Redeemer, let your will be my food and my sustenance, now and for ever. Dear Love, I ask only this grace: that my soul, purified and freed from anything unpleasing to you, might always remain arrayed in holy virtues, and thus be prepared for your coming, and for whatever it may please you to do with me.”