Summarizing generally the ten functions with the Four Siddhāntas displays that each of the ten functions in the Traces contains the Four Siddhāntas. The case is scrutinized by Chih-i with an example of the function, “destroying the three and revealing the one.” Chih-i explains in what sense this function contains the meaning of the Four Siddhāntas.

1. The Worldly Siddhānta is indicated by destroying attachment to the Three Vehicles and eradicating sickness, whereby one joyfully upholds the teaching of the Buddha concerning the One Buddha-vehicle.
2. The Siddhānta for Each Person is indicated by destroying the Three Vehicles and following the One Buddha-vehicle, whereby one’s mind for enlightenment arises, and one’s understanding of truth as the wholesome dharma enhances.
3. The Siddhānta of Counteraction is indicated by the Buddha’s teaching stating that being attached to the Three Vehicles is sickness, and by the Buddha’s explanation that striving for the One Buddha-vehicle is joy.
4. The Siddhānta of the Supreme Truth is indicated by one’s gaining insight into the principle as the One Buddha-vehicle upon hearing the teaching in terms of destroying the Three Vehicles.