Defining the base of reality as consciousness doesn't have to exclude universal truth if consciousness exists beyond the perception of your individual self. The way I see it is that the physical world is a model of consciousness as created by the consciousness itself. The model draws an illusory line between your body and the rest of the world, but the underlying fields are not actually separate, even in the model, e.g. magnetic and electrical fields, let alone the consciousness. One way I heard it out, I think by Alan Watts, is that seeing your true self is like trying to bite your own teeth.