Rasarnavasudhakara 3.297

3.297

sākṣad evopadeśena prāyo dharma-samanvayāt |
aṅgāṅgi-bhāva-sampanna-samasta-rasa-saṃśrayāt ||

Because of direct teaching, generally through the congruence of attributes, / and because of being the receptacle of all aesthetic sentiments endowed with the relation of principal and subordinate;