Transcendence is not the state of being transcendent of experience. To the contrary, the transcendent is capable of being experienced. The transcendent is not beyond all experience, for beyond experience there is nothing that can be thought or felt. Marcel sees Truth as a singularity. Being true is only one aspect of Being.
Truth emerges from Reality in that it defines only a single aspect of Reality.
The Universe realizes itself in the fulfillment of Truth. Truth is both immanent and transcendent. Truth is also a quality that defines judgments of value. A value judgment may be true or false, but we cannot describe the truth or falsehood of a sensation or a feeling. A sensation or a feeling is a mode of Being.