yad yad ãcarati śreşţhas tat tad evetaro janaḥ
sa yat pramãņaṁ kurute lokas tad anuvartate
Whichever and however a great personality conducts himself common men follow; whatever he accepts as authority that and that alone certainly all the world will follow. Therefore, a leader must preach what he is taught and teach as he preaches.
Bhagawad Gita, Chapter 3, Verse 21