Ashtangasamgraha 24.61

24.61

dṛḍhendriyabalatvācca na dvandvairabhibhūyate |

doṣagatyātiricyante grāhibhedyādibhedataḥ |

upakramā na tu dvitvādbhinnā api gadā iva ||

and owing to the firmness of the strength of the sense organs, he is not overcome by pairs of opposites. / Measures differ according to the movement of the doṣas, by distinctions of astringent, purgative, and so on, / but they do not differ from their two-fold nature, just as diseases do.