Buddhism (bauddham) soon loses its appeal when it goes beyond the six senses and especially the last sense which has to do with mentation (manas). In this sense Buddhism is all about complete transcendence.
The ordinary person does not realize that the world they put together, including their body of birth and the environment it lives and dies in is a mental representation albeit very real looking.
Key to locking on to this representation is consciousness (vijñāna) which is always dichotomous or the same, perceiver and perceiving. Such consciousness is never absolute, most primordial or first. This is reserved for spirit or ātman which excludes anātman (not spiritual, corporeal, empty of spirit).
Buddhism has changed significantly from what Siddhartha Gautama realized after he transcended consciousness. Having merged with spirit, he could distinguish ātman from anātman.
He said that an anātman refers to the five aggregates, namely, material shape, feeling, perception, volitional formations, and consciousness. They are always suffering and conditioned. The most troubling aggregate is consciousness which I have said earlier is always dichotomous: we are always stuck in the perceiver and perceiving mode.
It would safe to say that modern Buddhism is a distortion of what Siddhartha Gautama taught. It nowhere approaches the problem of consciousness, especially, the transcending of consciousness which leads to the elimination of rebirth since consciousness is the transmigrant from one life to the next.
Consciousness is always an unresolved tension. As mentioned earlier, it is the difference between perceiver and perceiving. There is a seeming unity between the two, even a harmony, but no transcendence of this duality. As with the example of an asymptote, the line that continually approaches a given curve can never meet it. When consciousness is transcended then is the great mystery revealed.