The six days or time periods, meaning so many consecutive stages in a person’s regeneration, are these, in outline:
The first stage is preliminary, extending from infancy to just before regeneration, and is called void, emptiness, and darkness. The first stirring, which is the Lord’s mercy, is the Spirit of God in constant motion on the face of the water.
In the second stage, a distinction is drawn between the things that are the Lord’s and those that are our own. The things that are the Lord’s are called a “remnant” in the Word. In this instance the “remnant” refers principally to religious knowledge acquired from early childhood on. This remnant is stored away, not to reappear until we arrive at such a stage. At present the second stage rarely comes into play without trouble, misfortune, and grief, which enable bodily and worldly concerns—things that are our own—to fade away and in effect die out. The things that belong to the outer self, then, are separated from those that belong to the inner self, the inner self containing the remnant that the Lord has put aside to await this time and this purpose.
The third stage is one of repentance. During this time, at the prompting of the inner self, we speak devoutly and reverently and yield a good harvest (acts of neighborly kindness, for instance). These effects are lifeless nonetheless, since we suppose that they come of our own doing. They are called the tender plant, then the seed-bearing plant, and lastly the fruit tree.
In the fourth stage, love stirs and faith enlightens us. Before this time we may have spoken devoutly and yielded a good harvest, but we did so in a state of trial and anguish, not at the call of faith and kindness. In consequence they are now kindled in our inner self and are called the two lights.
In the fifth stage, we speak with conviction and, in the process, strengthen ourselves in truth and goodness. The things we then produce have life in them and are called the fish of the sea and the birds in the heavens.
In the sixth stage, we act with conviction and therefore with love in speaking truth and doing good. What we then produce is called a living soul and a beast. Because we begin to act as much from love as from conviction, we become spiritual people, who are called [God’s] image.
In regard to our spiritual lives, we now find pleasure and nourishment in religious knowledge and acts of kindness; and these are called our food. In regard to our earthly lives, we still find pleasure and sustenance in things relating to our body and our senses, which cause strife until love takes charge and we develop a heavenly character.
Not everyone who undergoes regeneration reaches this stage. Some (the great majority, these days) arrive only at the first stage, some only at the second, some at the third, fourth, or fifth, very few at the sixth, and almost no one at the seventh.
from Secrets of Heaven, Sections 6-13