Freud's classic description of the purpose of psychoanalysis still holds, which is to work, love, and play. To the extent that your mind parasites are limiting you, it is likely to manifest in one of these areas: the ability to be productive in a meaningful and pro-social manner; the ability to find fulfillment in enduring intimate relationships; and the ability to be freely spontaneous and creative. Besides rhythm, who could ask for anything more?
The second aspect of therapy is more "positive," and in my opinion -- and the opinion of Bion, at least implicitly -- verges on the religious and the mystical. For it has to do with maintaining a harmonious dialectic between the two utterly different modes of being that constitute the human subject. Again, different psychoanalysts use different words to describe these different parts: you could say ego and unconscious; or like the Jungians, ego and Self; or Being and knowing; or symmetrical and asymmetrical consciousness; or the Dreamer Who Dreams the Dream and the one who is involved in it.
Following Bion, I simply chose to use the abstract symbol O for the ultimate unknowable reality underlying both the internal and external world. You might think of it as an existential "place marker," in that it signifies something that obviously exists -- must exist -- but which we can never, ever contain, describe, or completely circumnavelgaze. This is the inexhaustible ground of existence, which is not a riddle to be solved but a mystery to be played with and enjoyed. It tosses up various ideologies and philosophies -- various -isms and wasms -- out of its depths, and, like the ocean, washes them all aside with the passage of time. Today's cutting edge philosophy will be swept away in the cosmic tide, just like all its predecessors -- unless the philosophy specifically begins with O as its ultimate ground and final term. Which is one reason why proper theism is so much more infinitely deep than atheism. One Cosmos Under God Robert W. Godwin