Answer: To become like the Light means to reach the degree of bestowal. At first it’s necessary to separate yourself from the still, vegetative, and animate levels, and to understand the human degree, the degree of Adam, the one “similar” (Domeh) to the Light, bestowal. It’s necessary to figure out how I gather pieces of bestowal or grow them within through the correction of my relationship with my environment and the Creator.
This work is done every time above my desire, which naturally is inside me on the animate level. And I build the human degree, the form of bestowal, above it. The better the person begins to distinguish between these two notions, the greater the difference he begins to feel between the animal form within him and the human form, which is above this animal. All our work takes place on the borderline between the first and the second form, with the purpose of increasing the human form within us.
It’s not easy to separate these two forms within us in such a way that we perceive them in a completely equal way, as an inseparable pair: a rider, riding on horseback. Only then will we attain the understanding of what an animal and a human are. This is the main work of a beginner who needs to figure out how much attention he can dedicate to his animal and how much he must dedicate to his human in order to separate them and put each one in its place, so the one would control the other.
From the 1st part of the Daily Kabbalah Lesson 1/30/13, Writings of Baal HaSulam