"6. DIVORCE
The problem of divorce is a very delicate question as it often touches on a painful human reality.
The tradition of the Church of the first centuries — which continues to have authority for the Orthodox Church — put the emphasis very strongly on two related points:
the “uniqueness” of the authentic Christian marriage,
the permanence of married conjugal life.
We may recall here the analogy that Paul makes between the unity of Christ and his Church and that of the bride and bridegroom. This analogy that is as it were at the root of the mystery assumes the real and continuing unity of the married couple, which therefore totally excludes a simultaneous polygamy and views one single marriage as the ideal.
Divorce does not heal the diseased marriage but kills it. It is not a positive action or intervention. It is about dissolving the “mini-Church” that has been formed through the marriage relationship.[18] The Holy Scripture attributes divorce to the callousness of man.[19] This is seen as a fall and sin. And yet the Orthodox Church can however permit divorce and remarriage on the grounds of interpretation of what the Lord says in Matt. 19:9: “I tell you that anyone who divorces his wife, except for marital unfaithfulness, and marries another woman commits adultery.” According to Bishop Kallistos Ware divorce is an action of “economia” and “expression of compassion” of the Church toward sinful man. “Since Christ, according to the Matthaean account, allowed an exception to His general ruling about the indissolubility of marriage, the Orthodox Church also is willing to allow an exception”.[20]
A question we can ask ourselves is whether Christ considered marriage as being indissoluble? We need to be very clear in this as when Christ teaches that marriage may not be dissolved that does not mean that He is stating that it cannot occur. The completeness of the marriage relationship can be tainted by erroneous behaviour. In other words, it is the offence that breaks the bond. The divorce is ultimately a result of this break. This is also the teaching of the Eastern Church fathers. A quotation from the testimony of Cyril of Alexandria will be sufficient to make our point here: “It is not the letters of divorce that dissolve the marriage in relation God but the errant behaviour”.[21]
The violation of a marriage relationship is divided into two groups:
those resulting from adultery (unfaithfulness and immoral behaviour)
those proceeding from the absence of one of the partners (this absence must however have certain distinctives).
According to the spirit of Orthodoxy the unity of the married couple cannot be maintained through the virtue of juridical obligation alone; the formal unity must be consistent with an internal symphony.[22] The problem arises when it is no longer possible to salvage anything of this symphony, for “then the bond that was originally considered indissoluble is already dissolved and the law can offer nothing to replace grace and can neither heal nor resurrect, nor say: ‘Stand up and go’”.[23]
The Church recognizes that there are cases in which marriage life has no content or may even lead to loss of the soul. The Holy John Chrysostom says in this regard that: “better to break the covenant than to lose one’s soul”.[24] Nevertheless, the Orthodox Church sees divorce as a tragedy due to human weakness and sin."
orthodoxresearchinstitute.org/articles/liturgics/athenagoras_remarriage.htm#22