Foolishness for Christ (Greek: ? , Church Slavonic: , ) refers to behavior such as giving up all one's worldly possessions upon joining a monastic order, or deliberately flouting society's conventions to serve a religious purpose--particularly of Christianity. Such individuals have historically been known as both "holy fools" and "blessed fools". The term "fool" connotes what is perceived as feeblemindedness, and "blessed" or "holy" refers to innocence in the eyes of God.
The term fools for Christ derives from the writings of Saint Paul. Desert Fathers and other saints acted the part of Holy Fools, as have the yurodivy (or iurodstvo) of Eastern Orthodox asceticism. Fools for Christ often employ shocking and unconventional behavior to challenge accepted norms, deliver prophecies, or to mask their piety.
Parallels for this type of behavior exist in non-Christian traditions as well. The Avadhuta (Sanskrit), for example, the Islamic tradition of Qalandariyya and Malamatiyya Sufism and other crazy-wise mystics display similar traits. Nasreddin, of the Sufis, is also an example.
Certain prophets of the Old Testament who exhibited signs of strange behaviour are considered by some scholars to be predecessors of "Fools for Christ". The prophet Isaiah walked naked and barefoot for about three years, predicting a forthcoming captivity in Egypt Isaiah 20:2,3; the prophet Ezekiel lay before a stone, which symbolized beleaguered Jerusalem, and though God instructed him to eat bread baked on human waste, ultimately he asked to use cow dung instead Ezekiel 4:9-15; Hosea married a harlot to symbolize the infidelity of Israel before God Hosea 3.
By the opinion of certain scholars, these prophets were not counted as fools by their contemporaries, as they just carried out separate actions to attract people's attention and to awake their repentance.
According to Christian ideas, "foolishness" included consistent rejection of worldly cares and imitating Christ, who endured mockery and humiliation from the crowd. The spiritual meaning of "foolishness" from the early ages of Christianity was close to unacceptance of common social rules of hypocrisy, brutality and thirst for power and gains.
By the words of Anthony the Great: "Here comes the time, when people will behave like madmen, and if they see anybody who does not behave like that, they will rebel against him and say: 'You are mad', -- because he is not like them."
The most famous example in the Western church is St. Francis of Assisi, whose order was known for following the teachings of Christ and walking in his footsteps. Thus, upon joining the order, Franciscans gave away all possessions and focused on preaching in the streets to the common man.
Saint Juniper, an early follower of the Franciscan order, was known for taking the doctrine of the Franciscans to the extreme. Whenever anyone asked for any of his possessions, he freely gave them away, including his clothes. He once even cut off the bells from his altar-cloth and gave them to a poor woman. His fellow Franciscans had to watch him closely, and strictly forbade him from giving away his clothes. While such behaviors were embarrassing to his brothers, he was also recognized as a pure example of the Franciscan order and thus esteemed.
"The Little Flowers of Saint Francis of Assisi", which documents the oral traditions of the Franciscans, told several stories of "Brother Juniper". The most famous of these is the story of how Brother Juniper cut off the foot of a pig to give it to a sick brother. Upon the sick brother's request for a pig's foot, Brother Juniper took a kitchen knife and ran into the forest, where he saw a herd of swine feeding. There, he quickly cut the foot off of one of the swine and carried it back to the brother, leaving the swine to die.
This angered the herdsman, who complained to Saint Francis. Saint Francis confronted Brother Juniper, who joyfully exclaimed, "It is true, sweet father, that I did cut off the swine's foot. I will tell thee the reason. I went out of charity to visit the brother who is sick." Brother Juniper likewise explained to the angry herdsman who, seeing the "charity, simplicity, and humility" (Hudleston, 1953) in Brother Juniper's heart, forgave him and delivered the rest of the pig to the brothers.
The Holy Fool or yuródivyy () is the Russian version of foolishness for Christ, a peculiar form of Eastern Orthodox asceticism. The yurodivy is a Holy Fool, one who acts intentionally foolish in the eyes of men. The term implies behaviour "which is caused neither by mistake nor by feeble-mindedness, but is deliberate, irritating, even provocative."
In his book Holy Fools in Byzantium and Beyond, Ivanov described "holy fool" as a term for a person who "feigns insanity, pretends to be silly, or who provokes shock or outrage by his deliberate unruliness."  He explained that such conduct qualifies as holy foolery only if the audience believes that the individual is sane, moral, and pious. The Eastern Orthodox Church holds that holy fools voluntarily take up the guise of insanity in order to conceal their perfection from the world, and thus avoid praise.
Some characteristics that were commonly seen in holy fools were going around half-naked, being homeless, speaking in riddles, being believed to be clairvoyant and a prophet, and occasionally being disruptive and challenging to the point of seeming immoral (though always to make a point).
Ivanov argued that, unlike in the past, modern yurodivy are generally aware that they look pathetic in others' eyes. They strive to pre-empt this contempt through exaggerated self-humiliation, and following such displays they let it be known both that their behaviors were staged and that their purpose was to disguise their superiority over their audience.
Fools for Christ are often given the title of Blessed (), which does not necessarily mean that the individual is less than a saint, but rather points to the blessings from God that they are believed to have acquired.
The Eastern Orthodox Church records Isidora Barankis of Egypt (d. 369) among the first Holy Fools. However, the term was not popularized until the coming of Symeon of Emesa, who is considered to be a patron saint of holy fools. In Greek, the term for Holy Fool is salos.
The practice was recognised in the hagiography of fifth-century Byzantium, and it was extensively adopted in Muscovite Russia, probably in the 14th century. The madness of the Holy Fool was ambiguous, and could be real or simulated. He (or she) was believed to have been divinely inspired, and was therefore able to say truths which others could not, normally in the form of indirect allusions or parables. He had a particular status in regard to the Tsars, as a figure not subject to earthly control or judgement.
The first reported fool-for-Christ in Russia was St. Procopius (Prokopiy), who came from the lands of the Holy Roman Empire to Novgorod, then moved to Ustyug, pretending to be a fool and leading an ascetic way of life (slept naked on church-porches, prayed throughout the whole night, received food only from poor people). He was abused and beaten, but finally won respect and became venerated after his death.
The Russian Orthodox Church numbers 36 yurodivye among its saints, starting from Procopius of Ustyug, and most prominently Basil Fool for Christ, who gives his name to Saint Basil's Cathedral in Moscow. One of the best-known modern examples in the Russian Church is perhaps St Xenia of Saint Petersburg.
"Crazy for God" is an expression sometimes used in the United States and other English speaking countries to convey a similar idea to "Foolishness for Christ." It has been especially connected to the Unification Church of the United States. In The Way of God's Will, a collection of sayings popular among church members, Unification Church founder Sun Myung Moon is quoted as saying: "We leaders should leave the tradition that we have become crazy for God."
In 2007, author Frank Schaeffer titled his autobiography Crazy for God: How I Grew Up as One of the Elect, Helped Found the Religious Right, and Lived to Take All (or Almost All) of It Back. It tells of his upbringing as the son of a well-known evangelical minister and his later conversion to the Greek Orthodox Church.
In the same year Stephen Prothero, author and chairman of Boston University's Department of Religion, wrote in the Harvard Divinity Bulletin: "I am crazy for people who are crazy for God: people nearly as inscrutable to me as divinity, who leave wives and children to become forest-dwelling monks in Thailand, who wander naked across the belly of India in search of self-realization, who speak in tongues and take up serpents in Appalachia because the Bible says they can."
"On fire for God" is an expression often used in respect of persons who are engaged in serving God in such a way that their activities reflect a 'burning' desire to fulfil their calling. This often manifests itself in what might be regarded as burning passion, such as evangelising (preaching) on the streets.
One of the more recent works in theology is Fools for Christ by Jaroslav Pelikan. Through six essays dealing with various "fools," Pelikan explores the motif of fool-for-Christ in relationship to the problem of understanding the numinous:
The Holy is too great and too terrible when encountered directly for men of normal sanity to be able to contemplate it comfortably. Only those who cannot care for the consequences run the risk of the direct confrontation of the Holy.
There are a number of references to the yurodivy in 19th century Russian literature. The holy fool Nikolka is a character in Pushkin's play Boris Godunov and Mussorgsky's opera based on the play. In Pushkin's narrative poem The Bronze Horseman, the character of Evgenii is based in the tradition of the holy fools in his confrontation with the animated statue of Peter the Great.
The yurodivy appears several times in the novels of Dostoevsky. The Idiot explores the ramifications of placing a holy fool (the compassionate and insightful epileptic Prince Myshkin) in a secular world dominated by vanity and desire. According to Joseph Frank "though the gentlemanly and well-educated prince bears no external resemblance to these eccentric figures, he does possess their traditional gift of spiritual insight, which operates instinctively, below any level of conscious awareness or doctrinal commitment." In Demons, the madwoman Marya Lebyadkina displays many of the attributes of the holy fool, as do the characters of Sofya Marmeladova and Lizaveta in Crime and Punishment.
Grisha's abnormal social conduct, seizures, and rants were common behaviors amongst holy fools. The esteem expressed by adults was also common. In his autobiography, Tolstoy expressed such esteem in reaction to overhearing Grisha praying: