As for the vice of lust - aside from what it means for spiritual persons to fall into this vice, since my intent is to treat of the imperfections that have to be purged by means of the dark night - spiritual persons have numerous imperfections, many of which can be called spiritual lust, not because the lust is spiritual but because it proceeds from spiritual things. It happens frequently that in a person's spiritual exercises themselves, without the person being able to avoid it, impure movements will be experienced in the sensory part of the soul, and even sometimes when the spirit is deep in prayer or when receiving the sacraments of Penance or the Eucharist. These impure feelings arise from any of three causes outside one's control. First, they often proceed from the pleasure human nature finds in spiritual exercises. Since both the spiritual and the sensory part of the soul receive gratification from that refreshment, each part experiences delight according to its own nature and properties. The spirit, the superior part of the soul, experiences renewal and satisfaction in God; and the sense, the lower part, feels sensory gratification and delight because it is ignorant of how to get anything else, and hence takes whatever is nearest, which is the impure sensory satisfaction. It may happen that while a soul is with God in deep spiritual prayer, it will conversely passively experience sensual rebellions, movements, and acts in the senses, not without its own great displeasure. This frequently happens at the time of Communion. Since the soul receives joy and gladness in this act of love - for the Lord grants the grace and gives himself for this reason - the sensory part also takes its share, as we said, according to its mode. Since, after all, these two parts form one individual, each one usually shares according to its mode in what the other receives. As the Philosopher says: Whatever is received, is received according to the mode of the receiver. Because in the initial stages of the spiritual life, and even more advanced ones, the sensory part of the soul is imperfect, God's spirit is frequently received in this sensory part with this same imperfection. Once the sensory part is reformed through the purgation of the dark night, it no longer has these infirmities. Then the spiritual part of the soul, rather than the sensory part, receives God's Spirit, and the soul thus receives everything according to the mode of the Spirit.
I recall Decimus instructing me while at work that wrong friends will make my heart yearn for sin more than it usually does. Compromises will be easier and wisdom will be replaced with folly. I just figured that they didn’t know him, and therefore were judging him. Plus, I told them that Erebus …was interested in becoming a Christian, and that was the basis of our friendship. My biggest mistake was when I told John that Jesus spent time with sinners far worse than Erebus. ‘Oh foolishness, you forget I was with Jesus when he was in the homes and company of sinners,’ John chided. ‘Jesus did not come to make friends, but to call sinners to repent. Do that long enough and let’s see how many friends you pick up…His visits were hardly a social call…He did not save any lost soul by living like that lost soul…until Erebus sees Christ in you, you are guilty of leading him astray as I’m afraid he is leading you astray...As I see it, friendships are grown when you are all going in the same direction, and can help, encourage and protect all involved. Friendships are not to be reckless, but constructive and purposeful where you are building each other up and improving each other’s character. If this isn’t that inner, guiding principle of all the friends you hold, then in what direction is it actually going, and what good will be derived from it? If friends are not making each other better, then they’re fulfilling the role of our spiritual enemy by tearing down what is good and ruining what had potential……