Answer: We are in a system of fixed laws that connects matter (the desire to receive) and the Light (the attribute of bestowal). They are two opposites by nature. The desire to receive typically enjoys the light of separation and hates the light of adhesion.
So the question is: What should we do with these two opposites? Which should we prefer? How should we grow stronger along a way that is hated and so unpleasant to such an extent that we cannot follow it and we subconsciously push it away?
This is what all our work should be about in order to ascend above the current feeling to the level of thought.”Everything becomes clear in thought,” so we first must sustain ourselves in thought and not feeling. The thought constantly must examine and study the feeling so that eventually we will understand which feeling we must reach.
From the 1st part of the Daily Kabbalah Lesson 6/19/13, Writings of Rabash