Vivekacūḍāmaṇi: The Crest-Jewel of Discrimination by Shankara Ācārya verses 101-150. Blindness, weakness and sharpness are conditions of the eye, due to its fitness or defectiveness merely; so are deafness, dumbness, etc., of the ear and so forth – but never of the Ātman, the Knower. Inhalation and exhalation, yawning, sneezing, secretion, leaving this body, etc., are called by experts functions