they're demonic, please skip.
>The praying mind must be in a fully truthful state. Imagination, however alluring and well-appearing it may be, being the willful creation of the mind itself, brings the latter out of the state of Divine truth, and leads the mind into a state of self-praise and deception, and this is why it is rejected in prayer. The mind during prayer must be very carefully kept without any images, rejecting all images, which are drawn in the ability of imagination… Images, if the mind allows them during prayer, will become an impenetrable curtain, a wall between the mind and God.-St. Ignatii (Bryanchaninov)
Human imagination can lead to fake sensory experiences, falsely recognized by the person as originating outside of his or her mind: Guard yourself from imagination, which can make you fancy that you see the Lord Jesus Christ, that you touch and embrace Him. This is empty play of puffed-up and proud self-opinion! This is deadly self-praise!…Imagining the Lord and his saints gives to the mind as if materiality, leads it to the false, prideful opinion of self—leads the soul into a false state, a state of deceptive self-praise…If during your prayer there appears to your senses or spontaneously in your mind an image of Christ, or of an Angel, or of any Saint—in other words, any image whatsoever—do not accept this apparition as true in any way, do not pay any attention to it, and do not enter into a conversation with it. Otherwise, you will surely suffer deceit and most serious damage to your soul, which has happened to many.
>Purposefully creating images in one’s mind, and even accepting those appearing spontaneously, is not only dangerous spiritually, but can also lead to the damage of the soul, or psychological problems, “which,” he says, “has happened to many.”
>When one, standing at prayer and lifting up his hands, and eyes, and mind to heaven, imagines in his mind divine councils, the heavenly goodness, the ranks of angels, and the dwellings of the saints; in other words, all that he has heard from the Divine Scriptures, he collects into his mind… But during this type of prayer, little-by-little, [he] starts to puff-up in his heart, not understanding this himself; it seems to him that what he is doing is from God’s grace [given] for his comfort, and he asks God to let him always be in this state. But this is a sign of great deception… Such a person, [if he practices this type of prayer in seclusion] will hardly be able to stay sane. But, even if it so happens that he does not go insane, he, nonetheless, will not be able to acquire virtues… -Saint Simeon the New Theologian
>Saint Isaac of Syria, a bishop and theologian, writing centuries earlier, conveys a similar warning to those who desire visions, saying that such a person is “tempted in his mind by the devil who mocks him”
In other words, according to St. Ignatii (Bryanchaninov), purposefully creating images in one’s mind, and even accepting those appearing spontaneously, is not only dangerous spiritually, but can also lead to the damage of the soul, or psychological problems, “which,” he says, “has happened to many.”
Commenting on this passage, St. Ignatii (Bryanchaninov) calls imaginative prayer “most dangerous”:The most dangerous of the incorrect types of prayer consists of the person creating imaginary pictures, seemingly borrowing them from the Holy Scripture, but in reality—from his own state of fall and self-pride; and with these pictures he flatters his own self-opinion, his fall, his sinfulness, deceives himself. Obviously, everything which is created by the imagination of our fallen nature, does not exist in reality, is make-belief and false… The one who imagines, with the first step on the path of prayer leaves the area of truth and enters the area of deceit, passions, sin, Satan.