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In page Taoism:

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The trinity is thought by scholars to have evolved into the Three Pure Ones.[4] It was thought of in the early Han dynasty as the three gods Tianyi, Diyi, and "the Taiyi".[4] These beings were varyingly interpreted as relatively simple heavenly, earthly, and all-purpose gods respectively,[citation needed] the "supreme deity" (an intangible god that represented the mind of the Tao), "his disciple", the Lord Tao (a more physical god representing the Tao), and Lord Lao (Laozi "deified"),[4] or an emanation of the Tao that was ultimately singular in nature.