Rumi’s statement embodies the ultimate truth. There is only One and all else is illusion. The self he suggests we behead is the illusory self, which does not truly exist. In other words, he is inviting us to behead separation.
The illusion of separation, or duality, is the primary illusion from which all illusions unfold. Through it we create ourselves as separate from Source. We become a subject and Source becomes an object.
We further create ourselves as separate from all and everything in the same way. Through repetition of this experience, we become identified with and further substantiate the illusion of separation. Yet, illusion is illusion. It is but a dream we are dreaming that we believe is real. It is a fantasy that we are mistaking for the truth.
To awaken from the dream is to behead yourself. In this way, truth disempowers illusion while the experience of oneself as Source dispels all separation.
Initially this is a radical experience because of the contrast between truth and illusion. Yet, with consistency, it becomes an integrated and substantiated experience. Thus it is truthfully said that life is a progressive process of ever-increasing integrative wholeness.
Once you have beheaded yourself and have awakened from the dream of separation you begin to journey the progressive process of integration and substantiation. You observe the relative oscillation of truth and illusion within your experience, catch yourself more quickly within the illusion and return to the truth. Thus, progressively, your truthful wholeness increases. Such is the evolution of Source Consciousness in human form. You are always more than you have ever been.
So….. take a moment or two and delight in the process here and now as you become aware of the relative dance of truth and illusion. As you remain unified in your experience, be aware that while truth and illusion always oscillate, you can emphasize the truth and extend its duration. In this way, truthful holistic experience will progressively dominate illusory experience and you will enjoy the consistency of blissful Oneness. Such is the integration and substantiation of unified Source Consciousness in human experience.