Tendai Lotus School Teachings, p 71Q: Is this [threefold truth of] emptiness, conventional existence, and the Middle [of being simultaneously empty and conventionally existent] included in one thought, or included in [many] different thoughts?
A: It is included in one thought.
Q: What do you mean [when you say] that it is included in one thought?
A: One thought in the mind truly has no substantial mark. This is called emptiness. But there is no dharma that it does not encompass. This is called conventional existence. It is neither one nor differentiated. This is called the Middle. Therefore it is known that each and every [thought] is suchlike. All contain the threefold truth. Each aspect of the threefold truth is present in one thought.