Answer: A feeling is a sensation in the desire.
Desire is the matter of all of creation, and the sensation inside the desire is called feeling. Since all of creation is one differentiated, integral desire, then all that exists inside it is feelings.
We are not talking just about the universe here, but about all the worlds, about the entire, vast creation. There are two kinds of feelings found there, hatred and love, and we exist between them.
Therefore, we must see how to differentiate them, on what basis do we make a verdict: the feeling that I treat with hatred or love, whether the feeling itself is called “hatred” or “love,” or do I determine how it will be in relation to a certain sensation? In other words, it is a science about feelings.
From the Kabbalah Lesson in Russian 8/13/17