The objection deserves its strongest form before anything else. Christ sent the apostles into the world and not out of it, and the shape of the New Testament is centrifugal: preach, baptize, plant, write letters. Paul lists the qualifications of a bishop and assumes he has a wife and children (1 Timothy 3:2, Titus 1:6). He warns of a coming teaching that forbids marriage and calls it a doctrine of demons (1 Timothy 4:1-3). Nowhere in Acts is there an institution of men who withdraw from society to fast. Set beside that, a peninsula of celibate men eating one meal a day looks like a later invention, and worse than an invention: a two-tier Christianity in which some believers are professionals and the rest are laity, which is close to the thing the Reformation was against. That is a serious case and it is not answered by changing the subject.
It is answered, if at all, by noticing how much of the Old Testament it has to leave out. Israel had companies of men living in community around a prophet: the sons of the prophets at Bethel, Jericho and Gilgal, who tell Elisha that the place where they dwell with him has grown too small (4 Kingdoms 6:1-2 [2 Kings 6:1-2]) and who eat from a common pot in a famine (4 Kingdoms 4:38-41). Elijah himself lives by the brook Cherith fed by ravens, and goes forty days without food to the cave at Horeb (3 Kingdoms 17 and 19 [1 Kings 17 and 19]). The Law itself provides for voluntary asceticism in the Nazirite vow of Numbers 6:1-8: a man or a woman, for a period of their own choosing, separated to the Lord, no wine or strong drink, no razor on the head, no contact with the dead. Nobody is commanded to take that vow. The Law blesses it when it is taken. And in Jeremiah 35 God holds up the Rechabites, who drank no wine and lived in tents, as a rebuke to Judah for disobedience.
Then John the Baptist, who is the Church's pattern of the monk and not by accident. He is in the deserts from his youth (Luke 1:80); he wears camel's hair and a leather belt and eats locusts and wild honey (Mark 1:6); he is celibate, poor, and outside the settled world, and the Lord says no one born of women is greater. When the Orthodox tonsure service and the monastic hymns want an image for what a monk is, they reach for John. Behind him stands the forty days of Christ Himself in the wilderness, fasting (Matthew 4:1-2), which the rite of profession names explicitly: the pleated mantle given to the new monk is explained as a memorial of those forty days.
Then the two sayings of the Lord that a Protestant has the most trouble placing. In Matthew 19:12 Christ speaks of those who have made themselves eunuchs for the kingdom of heaven's sake, and adds, "He who is able to accept it, let him accept it." That is a saying about voluntary renunciation of marriage for the kingdom, and it is explicitly not addressed to everyone. Ten verses later, to the rich young man: "If you want to be perfect, go, sell what you have and give to the poor, and you will have treasure in heaven; and come, follow Me" (Matthew 19:21). Notice the conditional. Christ does not legislate; He puts a counsel to a particular willing man. That distinction between a commandment binding on all and a counsel offered to some is the whole basis of the monastic vocation in Orthodox theology, and it is not read into the text. It is the grammar of the text.
Paul makes the same distinction and is scrupulous about it. On virgins he says he has no commandment from the Lord and gives his own judgment (1 Corinthians 7:25). He wishes all men were as he is, and immediately concedes that each has his own gift from God (7:7). He wants the Corinthians free of care, and observes that the unmarried man cares for the things of the Lord and how he may please the Lord, while the married man cares for the things of the world and how he may please his wife (7:32-34). He ends by saying that the man who gives his daughter in marriage does well and the man who does not does better (7:38). Paul is not commanding celibacy and says so twice. But he is plainly saying that celibacy undertaken for the Lord is a genuinely freer thing for those to whom it is given, and Protestant preaching on 1 Corinthians 7 tends to stop one clause early.
For the common life there is Acts. The Jerusalem church had all things in common, sold its possessions and goods, and divided them among all as anyone had need (Acts 2:44-45); nobody said that anything he had was his own, and the proceeds of sold land were laid at the apostles' feet and distributed according to need (Acts 4:32-35). That is the nearest thing in the New Testament to what a cenobitic monastery actually is: voluntary common ownership under an authority, for the sake of need. Basil the Great will build his whole argument for community out of exactly these verses. The honest caveats are that the Jerusalem community was neither celibate nor withdrawn, and that the arrangement does not appear to have survived the first generation even in Jerusalem. But it is not nothing that the one time Christians pooled their property, Luke describes it with approval.
Two more. In Luke 2:36-37 there is Anna, a prophetess of the tribe of Asher, widowed after seven years of marriage, a widow of about eighty-four, who "did not depart from the temple, but served God with fastings and prayers night and day." That is a consecrated widow living an ascetic life inside the temple precinct, and she is one of the two people in Luke who recognize the infant Christ. And Hebrews 11:38, of the faithful before Christ: "of whom the world was not worthy. They wandered in deserts and mountains, in dens and caves of the earth." When Athanasius and Jerome come to describe what they have seen in Egypt, that is the verse they reach for, because they think they are watching the same thing happen again.
None of that adds up to a command. It does not have to, and this is where the Orthodox answer has to be stated carefully rather than triumphantly. Monasticism is not commanded of anyone. Celibacy is a gift, not an achievement and not a rank; Paul says it is a gift and the Church has never said otherwise. A monk is not a better class of Christian than a married deacon, and the Church has gone further than merely declining to say he is: it anathematized the people who said it.
The council was at Gangra in Paphlagonia, usually dated around 340, though the range serious historians propose runs from the 330s into the 350s and the question is genuinely unsettled. It was called against the followers of Eustathius of Sebaste, ascetics whose rigor had curdled into contempt for ordinary Christian life. Canon 1 anathematizes anyone who condemns marriage or says that a faithful and devout married woman cannot enter the kingdom. Canon 4 anathematizes anyone who refuses to receive communion from a married priest. Canon 9 anathematizes anyone who is celibate out of abhorrence of marriage rather than for the beauty and holiness of virginity itself. Canon 10 anathematizes a celibate who is arrogant toward the married. Canon 14 anathematizes a wife who leaves her husband because she despises marriage. The epilogue states the council's own position: it admires virginity when virginity is humble, it honours the holy companionship of marriage, and it is condemning not asceticism but the pride that had attached itself to asceticism. These canons were received into the canonical corpus of the whole Church and remain in force in Orthodox canon law.
So the position fixed in canon law within a generation of Anthony has two halves, and both are meant. Virginity freely undertaken for the kingdom is a higher way. The man who holds it while despising marriage is under anathema. A Protestant is usually told that Orthodoxy teaches the first half. He is rarely told that it legislated the second.
Eustathius of Sebaste is a reminder that the Church's argument with extreme asceticism came from inside the ascetic movement, not from a comfortable establishment resisting it. The bishops at Gangra were not opposed to monks. Basil the Great was Eustathius's admirer before he was his opponent, and Basil's own monastic rules were written partly to show what disciplined asceticism looks like when it is not contemptuous.