R’ Shamshon Refael Hirsch relates a concept where the first use of something in the Torah explains how it is used in all other cases. He cites the blessing by a Pidyon Haben as an example; זה קטן, גדול יהיה – “this small one, may he become great”. He explains that the first instances of the words קטן/גדול in the Torah are in reference to the luminaries, the sun and moon. The moon only reflects light, whereas the sun actually produces light. The blessing thus means, that the baby, at the time helpless and reliant on others, should become an independent and great person.
Adam has a problem of finding his עֵזֶר כְּנֶגְדּוֹ, partner, and this problem is solved when Hashem completes his surgery; וַיִּסְגֹּר בָּשָׂר, תַּחְתֶּנָּה – and He closed the flesh in its place. (2:21)
This is the first time the letter ס – “samech” – is used in a verb in the Torah – it’s appearance was limited to nouns and names until this juncture. The Torah is hinting that there is some kind of relationship between the letter and women getting married.
The letter ס, when spelt out, reads סֶמֶך, a support, meaning that Eve was intended to assist the Adam and be there for him.
The letter ס is circular, and in Kabbalah, a woman is likened to a circle, and a man to a square. The woman is meant to be an עֵזֶר כְּנֶגְדּוֹ, around him always. Incidentally, old rings in the cities of mekubalim like Tzfat used rings that have a square surrounded by a circle, illustrating this concept. This is partly why the bride circles the groom under the chupa.
This circular idea is further demonstrated by the numerical value of עֵזֶר כְּנֶגְדּוֹ, which equals 360, which happens to be the amount of degrees in a circle.