妙法蓮華經玄義 4.51

4.51

Now, explaining the names of the twenty-five samādhis is based on the meaning of the four siddhāntas: First, establishing them according to the circumstances of the time. Just as a person with many children gives each a name so that the siblings are not confused, the twenty-five samādhis are also like this: each is given a name so that conventional truths are not disordered. How could one cling rigidly to them? Second, establishing each name in accordance with convenience of meaning, each following its rationale. Third, establishing the names based on specific functions, where each has its principal corrective, thus deriving its name from the counteragent. Fourth, while the reality of the principle is truly nameless, names are established on the basis of the principle. Although there are these four meanings, the twenty-five samādhis are established largely through the counteragents and in reference to principle.