A slave of slavic origin who resided in Constantinople in the service of a high ranking member of the Imperial Guard, Saint Andrew took on the extreme Davidic ascesis of feigned madness after he was granted a vision one night during prayer. In this vision, God revealed that he had been enlisted in the struggle against out true enemies, “the principalities,…the powers,…the world rulers of this darkness,…and…the evil spiritual forces of the supernatural realms.” He was told to pursue this course as a fool for Christ, and he obeyed immediately the next day by tearing his clothes and wailing in a loud voice. Irony of ironies, his master thought him possessed and had him committed to the Church of Saint Anastasia Pharmocolytria where he was held in chains. There his struggle began in earnest – he gave himself over to various kinds of bizarre behavior by day and to prayer by night. Having bursted into the view of the Evil One like a burning sun, one night he was set upon by a horde of demons trying to snuff out his torch in its infancy. Andrew, however, sought the aid of the holy and glorious Apostle John the Theologian who drove off the demons with a thunderous clap from the physical chains that bound the holy Fool. The friend of Christ also promised Saint Andrew that he would be his ever-present help in his ongoing battle against the darkness.
Once his captors realized that he was a threat to the demons only rather than to himself or others, they released him, and Andrew began to freely wander the city. This allowed him to deepen his humility by voluntarily bearing the spitting and insults of the crowds in imitation of our Lord and Master at the Passion. In fact, in another vision in which he was taken up into the third heaven, the Lord revealed that this was his particular mission for the overthrow of the Prince of this world. When the people began to repent of their sins through the Holy Fool’s prophetic ministry and imitate his downward path of humility according to their measure, the demons reproached him for despoiling their possessions. Andrew responded by rebuking them with the Lord’s authority. Enraged at their impotence, for they had no claim on him, they contrived to cause the Saint to fall into a pit of the earth. But the Holy Fool was delivered by the calling upon the Holy Apostles Peter and Paul who drew him out of the pit as the Lord drew the Prince of the Apostles from the sea.
Sometime later, a plague broke out in the city, and Saint Andrew spent his days walking up and down the streets praying with tears for the people, their healing and the forgiveness of their sins. One day, while at prayer, he was transported by the Spirit, like another Saint Philip, to Anaplous to meet with Saint Daniel the Stylite who suggested that they join together in their prayers for the deliverance of the capital city. The Lord answered by fire from heaven, casting out the demon who had instigated the epidemic.
By the end of his life, he was able to distinguish between different demonic spirits at a glance as well as the state of the souls of those with whom he interacted. This allowed him, as an experienced soldier in the army of the Lord, to devise deft plans of spiritual combat to counteract the work of the evil one in the lives of the faithful if they would but heed his instruction.