He who is intent upon abstaining from injury to all creatures, who is truthful, gentle, charitable, and pure in mind, shineth greatly among his kinsmen like a precious gem of the purest ray having its origin in an excellent mine. That man who feeleth shame even though his faults be not known to any save himself, is highly honoured among all men. Possessed of a pure heart and boundless energy and abstracted within himself, he shineth in consequence of his energy like the very sun.

In plain words: Vidura says a person who harms no living being and is truthful, gentle, generous, and pure-minded shines among his family like a perfect gem. Someone who feels ashamed of his faults even when nobody else knows them is honoured by all, and with a pure heart and great energy he shines like the sun.