We need to try to imagine that all of reality is within one person and that the Torah tells us about him. Thus, all advancement takes place within one desire, one man, starting from that same moment that he begins to know himself until he attaches himself to the Creator, to the path that leads to the revelation of the upper force. On the way, he goes through all kinds of states. He needs to try to categorize these states, to define them as “Babylon,” “Canaan,” the levels of “Abraham,” “Isaac,” and “Jacob,” the entrance into Egypt, and slavery in Egypt.
All of this happens inside one desire, within one man, and only the attitude of the states in which he finds himself changes. He begins at the level of Jacob in which he begins to discover the evil inclination, the work of the “left line.” Against it, he begins to work with the “right line.”
This means that the preparation made from Above that is called “fathers” has ended, and the period of the “sons” begins when the person begins to develop himself. He becomes acquainted with his ego more and more until he reaches the sensation and the recognition that he is in slavery to the ego.
Then, he begins to work against it, and he asks the Light for correction. A person undergoes these two forms of development, the work with the two lines and the stage that precedes that even before entering the spiritual world, before beginning to work for the sake of bestowal (Lishma).
From the first part of the Daily Kabbalah Lesson, April 23, 2012, Writings of Rabash