This verse uses "man" in a masculine sense, meaning thoughts and ideas in the intellect. Leaving father and mother means leaving the former state of internal spiritual awareness, and cleaving to his wife means being conjoined instead with the external awareness of life. Being one flesh means that the internal of the man and the external of the wife were together as one in life.

The people of the Most Ancient Church wanted to live from themselves. So the Lord created in them the capacity to feel that, though it meant they had to descend from the spiritual awareness they had enjoyed. But they weren't bad people; they still loved the Lord and wished to be good. They just wanted to feel that they were doing it themselves. By having the man cleave to the wife, the Lord allowed the people's higher internal states to enter into their external lives and be part of that sense of self, so they could indeed love the Lord as if from themselves.

(Referenser: Arcana Coelestia 160, 161, 162)

5577. 'In the land' means in the case of the integral parts of the Church. This is clear from the meaning of 'the land' in the Word as the Church, and therefore here the integral parts of the Church; for whatever serves to mean the Church also means its integral parts since it is made up of these. The reason why in the Word 'the land' means the Church is that the land of Canaan was the one in which the Church had existed since most ancient times. Consequently when the expression 'the land' appears in the Word it is used to mean the land of Canaan; and when this particular land is meant one understands the Church. For when the expression 'the land' appears there, people in the spiritual world do not concern themselves with the idea of a land, only with the idea of the nation inhabiting it; yet not with an idea of that nation but with an idea of the essential nature of it. Consequently they concern themselves with an idea of the Church when 'the land', used to mean the land of Canaan, appears there.

[2] From this one may see how deluded those people are who believe - on the basis of prophetical utterances in the Old Testament, and in John in the New - that on the day when the last judgement takes place a new earth or land and a new heaven or sky are going to be created, when in fact nothing else than a new external Church is meant by 'a new earth' and a new internal Church by 'a new heaven'. These deluded people also believe that something other than the Church is meant when the expression 'the whole earth' is used in the Word. This shows how little understanding of the Word exists with those who imagine that the Word does not contain any meaning more holy than that shining out of the letter alone.

Regarding the existence of the Church in the land of Canaan since most ancient times, 3686, 4447, 4454, 4516, 4517, 5136.

Regarding 'the land' in the Word meaning the Church, 662, 1066, 1067, 1262, 1413, 1607, 1928, 4447.

Regarding 'a new heaven and a new earth' meaning a new Church, internal and external, 1733, 1850, 2117, 2118 (end), 3355 (end), 4535.