''Indriya'' (literally "belonging to or agreeable to Indra") is the Sanskrit and Pali term for physical strength or ability in general, and for and specifically refers to the ''five spiritual faculties'', the five or six sensory faculties, and the twenty-two phenomenological faculties. defines it as: "Indriya is one of the most comprehensive & important categories of Buddhist psychological philosophy & ethics, meaning 'controlling principle, directive force, élan, dynamis'...: (a) with reference to sense-perceptibility 'faculty, function'...."}}
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