The Gateway represents the construction of a person's mental understanding of The Way.
The Gateway allows the user to transcend from the physical state into the state of tranquility and freedom; the Unconditioned State. A process that takes place solely within ones mind.
This construction consists of being educated upon Foundational Knowledge, Meditation, and an essential Understanding of Dao.
The Gateway also represents the present moment, exactly like the Doorway. Since the present moment is always approaching - every moment is like a Doorway.
The Gateway represents the Doorway of
the Unconditioned State.