Shanti Parva 299.42

He alone amongst the Brahmanas who is endued with wisdom is always happy. He alone. amongst the Brahmanas who is endued with wisdom, succeeds in practising the vow of silence though living in the midst of many. He alone amongst the Brahmanas who is endued with wisdom, thought actually weak, is considered as strong. He alone amongst them who has wisdom succeeds in avoiding quarrel.