Sanskrit CATVāri yathā-bhta-parij? ānāni. It is the symmetry of "four thoughts". It refers to four kinds of positive wisdom caused by name, thing, self-nature and different thoughts. He also knows four things, knows four things truthfully, and understands four things truthfully. Namely: (1) Mingsi (van nā maisan ā-gata-yathā-BH ū ta-parij? āna), and be realistic from the name, know the truth from the name. It is said that the Bodhisattva has learned all kinds of famous sayings of dharma circles truthfully, but it is the same as the world, in order to make the world think and speak; Without this pen name, there would be no thought and no persistence. If you don't insist, there is nothing to say. Being able to know the truth in this way is called the true wisdom cited by famous thoughts. (2) the truth and wisdom quoted in thinking (van vastv-esanā-gata-yathā-bhta-parij? āna), and seeking truth from facts, know the truth from things. That is to say, the bodhisattvas' views on everything such as color are divorced from words and cannot be silent. Being able to know wisdom in this way is called true wisdom derived from thinking about things. (3) Truth and wisdom cited by fallacious thinking of self (Van svabhāva-praj? apty-esanā-GATA-yathā-bhta-parij？ āna), but also with self-imposed to seek true wisdom, truthfully know the edge. It is false and untrue to say that the bodhisattva's self-nature truly understands the law, and its nature is unattainable, like the image of the water and the moon, rather than the other. The wisdom that can truly know the deepest meaning of the realm is called the true wisdom led by self-false thinking. (4) The difference between false thinking and true wisdom (Brahma VI? esa-praj？ apty-esanā-GATA-yathā-bhta-parij？ āna), but also with the difference between real wisdom and edges and corners. Refers to the true wisdom that can lead to different hypotheses; In other words, we really know the representation and separability of the differences between various laws. From the perspective of meaning, there are differences in various methods such as colorless; In terms of secular truth, there are differences in various laws such as color. Therefore, knowing truth and vulgarity are interdependent. Being able to know the truth and customs in this way is called the truth and wisdom cited by wrong thinking.