Answer: This is due to the lack of confidence, or in other words the absence of the Light of Hassadim. This is precisely what we need to obtain.
For example, I am on the first degree and need to reach the second degree. The Light of Hassadim is the difference between the two degrees. I don’t have this Light and there isn’t anyone who can give it to me. My only option is to include myself in the environment and obtain the Light of Hassadim from it. After all, the environment is the quality of Вina.
Upon obtaining this Light I elevate to the second degree and obtain a realization: the Light of OM (Ohr Makif) comes and fills Hassadim.
This is how I obtain both the Light and the vessel.
From the 3rd part of the Daily Kabbalah Lesson 3/21/12, The Study of the Ten Sefirot