When he sees that we walk directly towards virtue, the malign demon attacks us with the fourth deception proposed above. This consists in various good desires that he excites within us, so that we will fall from the exercise of virtue into vice.
Consider a person who finds herself in bad health, but bears her infirmity with a patient will all the same. The wise adversary, knowing that he can instill a habit in the patient, places before her many good works that she could accomplish if only her health were in a different state. He make 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 slowly increases it little by little. She finds herself disturbed by the fact that she cannot put her will into effect; as her desires grow greater and stronger within her, so does her disquiet grow. The enemy uses this slowly and ably to lead her away. She grows impatient with her infirmity not as an infirmity, but as an obstacle to those works that she longs anxiously to effect for the greater good. Once he has goaded her to this point, the demon just as readily strips from her mind the goal of divine service and of good works, leaving within her the naked desire to free herself from infirmity. Since she cannot do as she wills, 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 and oppose this deception? When you find yourself in some tormented state, be attentive not to give room to those desires for some good work that disturb you because you cannot effect them at the moment. In this, you must accept with complete humility, patience and resignation that your desires would not have the effect that you imagine, for you are more vile and unstable than you fancy. Or, think that God, in his hidden judgment, or due to your unworthiness, does not wish 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 receiving holy communion, do not allow yourself to get upset and become disturbed from the desire for these things. Rather, stripped of all your proprieties, clothe yourself in the approval of your Lord. 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 ever praised and blessed. In truth, my Lord, I trust in your supreme goodness. See to it that I open my hear to your every will, obeying and taking pleasure in all things. See to it that I open my heart to you, disposing it to your every will, so that you, entering it spiritually, will console and strengthen it against those enemies that seek to distance it from you. In this way, may everything that is good to your eyes be done. My Creator and Redeemer, may your will be my food and my sustenance, now and for ever. Dear Love, I ask only for this grace: that my soul, purified and freed from whatever does not please you, will always remain decorated by holy virtues, and with them it will remain ready for your coming, and for whatever it may please you to do with me.”