Human beings must unwillingly carry out all actions that are necessary to sustain physical life in the body. For example, even when we are ill and lack the desire to eat, we still force ourselves to take food, knowing that we will not become healthy otherwise. This is because, in our world, reward and punishment is clearly discernable for everyone; thus, all must obey the laws of nature...
The most important determinant of the perception of pleasure is the thirst for pleasure, which in Kabbalah is known as a “vessel.” The size of the vessel is determined by the degree to which one feels the need for the lack of pleasure...
There are two kinds of Light of the Creator: the Light of knowledge, reason, and wisdom (called Ohr Hochma), and the Light of mercy, confidence, and unity (called Ohr Hassadim). In turn, Ohr Hochma comes in two types according to its action upon us...