In this video Yuttadhammo Bhikkhu asserts that the Buddha taught two aspects of reality: the conceptual and the ultimate.
The conceptual aspect involves using language and concepts to help people understand reality, such as using the concepts of self or existence.
The ultimate aspect, however, refers to the true nature of reality, which according to Yuttadhammo, is the world as we experience it.
Yuttadhammo believes that this teaching can help individuals understand and manage their emotions and physical sensations by providing a more accurate perception of reality.