God has created people and made them equals as regard their duties and rights, yet the early church made difference between people, some got full rights, and others got half rights. The Holy Book was never one hindered percent God's word. The rights of widows to remarry was given according to the class belonged too. For example, If a woman of an ex-priest wished to remarry, she would bring on herself shame because she belittled her first marriage.

Pope Shounda, the pope of the Orthodox church, tolerates remarriage but doesn't favour it.

The point of view of Christianity doesn't allow it but put it rank lower than the first marriage. Enthusiasm was so intense against remarriage to the extent that the word monogamia was used to refer to one time marriage  in the whole life even if one of the spouses died.

The early revered saints( Gyroum, Ambrsylous and Augustine) wrote against remarriage. So many writers followed the same way, there was nothing as dignified as monogamia in their works.

2- Remarriage is evidence of one's control over oneself

Saint Paul says in this regard:

For I would that all men were even as I myself. But every man hath his proper gift of God, one after this manner, and another after that.
⁸I saytherefore to the unmarried and widows, It is goodfor them if they abide even as I.
⁹But if they cannot contain, let them marry: for it is better to marry than to burn.
¹⁰And unto the marriedI command, yet not I, but the Lord, Let not the wifedepart from her husband:

 In another place he stressed his point of view :

Verses 39-40read,

“A wife is bound by law as long as her husband lives; but if her husband dies, she is at liberty to be married to whom she wishes, only in the Lord. But she is happier if she remains as she is, according to my judgment–and I think I also have the Spirit of God.” (NKJV)

So he considered remaining unmarried far better than the second remarriage. Many saints commented on the second remarriage; Saint Basylyous says remarriage is a remedy for adultery, saint Augustine says second remarriage is a sign of the absence of self control.  And also said the second remarriage is not a sin but it is in a lower rank. He explained that saying that the chastity of remarriage is good but to remain widowhood is far better.

Saint Ambrosyous says:

"I don't reject the second remarriage but I don't recommend it" and also says "It is not against the law to remarry but it is far better  not to remarry.

Gyroum says "Adam had just one wife, the second Adam(Jesus) had no wife, so let the supporter of the second remarriage show us a third Adam who remarried."

 He went on to say

" Just as the Apostle made the first marriage inferior to celibacy, the second marriage is inferior to the first marriage.   Remarriage is allowed for those who want to remarry and can't control themselves lest they are misled by the devil."

So the early saints showed the reason why they allowed the widows to remarry; it is for avoiding falling a prey to adultery, one of them even went on to say" for the same reason the virgins should marry.

The head of the priests in Jerusalem followed the same opinion; he says that this kind of marriage was allowed to prevent people from falling in adultery.  

The Christian theologian wonder how some animals and birds can reach the optimum chastity as they don't seek to find a spouse when their spouses die while men whom God created in His image cannot.