Arcana Coelestia #8
8. The second state is when a distinction is made between the things that are the Lord's and those that are man's own. Those which are the Lord's are called in the Word 'remnants', and here they are chiefly the cognitions of faith which a person has learned since he was a small child. These are stored away and do not come out into the open until he reaches this state. Nowadays this state rarely occurs without temptation, misfortune, and sorrow, which lead to the inactivity and so to speak the death of bodily and worldly concerns - the things which are man's own. In this way what belongs to the external man is segregated from what belongs to the internal. Within the internal are the remnants, stored away by the Lord until this time and for this purpose.
The New Jerusalem and its Heavenly Doctrine #36
36. III. THE INTERNAL AND THE EXTERNAL MAN.
Man is so created as to be in the spiritual world and in the natural world at the same time. The spiritual world is where the angels are, and the natural world where men are. As man is so created, there has been given to him an internal and an external; an internal by which he is in the spiritual world, and an external by which he is in the natural world. His internal is what is called the internal man, and his external is what is called the external man.