शास्त्रोक्तं धर्ममुच्चार्य स्वयमाचरते सदा ।
अन्येभ्यः शिक्षयेद्यस्तु स आचार्यो निगद्यते ॥
śāstroktaṁ dharmam uccārya svayam ācarate sadā |
anyebhyaḥ śikṣayed yas tu sa ācāryo nigadyate ||
(Unknown source)
“One who speaks the dharma stated in the śāstras, always personally practices it, and can teach it to others is called an ācārya.”