(en) « Glossaire T », sur nichirenlibrary.org (consulté le ).
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(en) Forest C. Stone, Schism, Semiosis and the Soka Gakkai, Washington, Western Washington University, 151 p. (lire en ligne), p37 Perhaps the most complex and original idea presented by Chih-I , the doctrine of Three Thousand Realms in a Single Thought-Moment (Jpn. ichinen-sanzen) is the culmination of Chih-I's thought and work, and is also a fundamental concept in Soka Gakkai Nichiren Buddhism today. This concept was originally presented in his Great Concentration and Insight and founded on the basis of the Expedient Means chapter of the Lotus Sutra. It combines the Ten Worlds, the Ten Factors and the Three Realms of Existence into an overarching theory of enlightened potential as it exists in all beings.