The Hebrew of the Old Testament has six different common words which are generally translated as "wife," which largely overlap but have different nuances. Swedenborg uses two different Latin words, which largely overlap but have different nuances. Meanwhile, "wife" is often paired with "man" or "husband," which are also catch-all translations for a basket of Hebrew and Latin terms. So it's hard to pin down one universal meaning for "wife"; context and subject matter have a large effect.

In general, though, marriage in the Bible represents the union we all seek between our hearts and our minds. If we know what is right and pursue it faithfully, the Lord will ultimately help us love doing what is good, and the two aspects of ourselves will be unified. On a higher level, marriage represents the union we can have with the Lord, both individually and collectively as a church. As an intrinsic part of the marriage, the wife plays a key role in that meaning. But that meaning is different depending on what is being described.

If the marriage is describing a person who is spiritual in nature – "spiritual" being the second degree of heavenly life, in which people are led by intellect and knowledge with the desire for good following – the wife represents the desire for good, the affections that drive the person. If the marriage is describing someone who is celestial in nature – "celestial" being the highest degree of heavenly life, in which people are led from love, with the intellect and ideas following – the wife represents the true ideas held by the person or church. If the marriage is describing the union between the Lord and the church, the wife represents the church.

In a way, these are symbolic meanings that actually have little to do with gender. When "wife" describes a church, obviously that church can include both male and female people. When "wife" describes an aspect of a person, that person can obviously be either male or female.

(Riferimenti: Arcana Coelestia 915, 1468, 1904 [1-2], 3246 [3-4], 3398, 4823 [2])

1895. 'She had an Egyptian servant-girl' means the affection for knowledge. This is clear from the meaning of 'a servant-girl' and from the meaning of 'Egypt'. Sarai, who is the mistress or lady, represents and means truth allied to good, as stated already. Truth allied to good is in the genuine sense intellectual truth, but rational truth comes below this and so is inferior. The latter is born from knowledge and cognitions that have been made living by means of an affection corresponding to them. Because this affection is part of the exterior man, it ought to be subservient to intellectual truth, which resides inmostly, in the way that a servant-girl is subservient to her mistress or a maid to the lady of - the house. That affection therefore is what is represented and meant by 'the servant-girl Hagar'.

[2] No one can have much understanding of anything said about these matters until he knows what intellectual truth is in the genuine sense and also in what way the rational is born, namely from the internal man as the father, and from the exterior or natural man as the mother. Unless the two are joined together nothing rational ever comes into being. The rational is not born from knowledge and cognitions, as people suppose, but from the affection for them, as becomes clear merely from the fact that nobody can possibly become rational unless some delight in or affection for such knowledge and cognitions burns within him. The affection constitutes the maternal life itself, while the celestial and spiritual within that affection constitute the paternal life. Consequently it is the degree and the quality of a person's affection that determine the degree and the quality of the rationality that is developed in him. In themselves facts and cognitions are nothing other than things that are dead, or instrumental causes, which are made alive by the life that belongs to affection. This is how everyone's rational man is conceived. The reason why the servant-girl was Egyptian and why that fact is mentioned is that 'Egypt' means knowledge, as has been shown already in 1164, 1165, 1186, 1462,