If there is a deficiency, it is good and is called “day.” If there is no deficiency, it is called “night.” This is how you should always check yourself. This is completely opposite from what we are used to because it doesn’t match the feelings in our desire to receive but rather in our tendency for bestowal, for holiness.
You should picture yourself standing in front of the King, trying to please Him, to bestow upon Him. But what can you bestow upon Him, with what can you please Him so that it can be considered our bestowal? We should check what He enjoys.
All the actions the Creator enjoys are called Mitzvot, and they can be performed only with the help of the reforming Light, called the Torah. All the Mitzvot are in the connections among the created beings, and so love thy friend as thyself is a great rule in the Torah. It is called the correction of the general desire by means of the Torah because the Light in it reforms. Then thanks to all the actions in which we connect, one great bestowal is created, called the general vessel, the one soul.
This yearning is called day, and the actions of connection are called Mitzvot. The general attribute that is revealed in that is called the attribute of bestowal, or Masach, the Reforming Light, in which the Host’s pleasure is revealed and the Host Himself. The direct Light is revealed in the returning Light according to the equivalence of form. Thus we advance.
From the 1st part of the Daily Kabbalah Lesson 1/25/12, Shamati #175