Assalaamu alaikum, FazelSubian,
Allah, The Most High, is The Best Knower, but I have to disagree with the pronouncements you have made here. The "duality" of Allah, and man, Creator, and created, Master, and slave is not a "delusion". Allah is The Purpose, all onto Himself, in that Allah does not need a purpose. HOWEVER, every created thing, is Created by Allah with, and for a purpose. Allah's Purpose. It is the purpose for which a thing is created that determines the moral criterion for that creation. Anything, any action that works towards the fulfillment of that creature's purpose is a Moral Good for that creature. Likewise, anything, any action that hinders, or leads away from that purpose, is a Moral Evil. Allah, being The Prime Purpose, is without purpose, and is, therefore, above, and beyond Good, and Evil. However, man, we, are CREATED, with a purpose, and therefore subject to Good, and Evil defined by the purpose for which we were created.
Allah has told us that He has Created us for the sole purpose that we should WORSHIP him. Worship is the proper relationship between man, and Allah, man's Creator, Lord, and Master. Islam is the Revealed Moral Criterion that Guides man in the fulfillment of this purpose. It shows mankind all that aids him in the fulfillment of his purpose, The Good, and all that deters him from the fulfillment of that purpose, The Evil.
What constitute WORSHIP? What does it mean? You suppose that the "ego", and the "self" are illusions, that must "die". However, the ego and the self are attributes instilled in us, by The Creator, Allah, and they, too, have a purpose. Consider this. All live developes in "stages" from birth to death. Man, as a Conscious Spirit, developes in stages. You suppose that the ego is a stage in the development of man's conscious. However, I disagree. The ego, the self is a permanent fixture, and feature of the human psyche, and while it can be grown, and purified, it can not be eradicated. To attempt to do so is a profound folly.