He who teaches us Veda and Vedanta or the six Shastras (systems), he who controls the breath, or brands his body with Mudras (metallic marks of Vishnu's weapons) or gives pleasing discourses regarding Brahma, he who gives mantras (sacred syllables) to the disciples and orders them to chant the same a certain number of times, but does not assure them any result in a definite time, he who by his spacious wordy knowledge explains beautifully the Ultimate Principle, but has himself got no experience or self-realization is not a Sad-guru. But he, who by his discourse creates in us, a distaste for the enjoyments of this world and the next, and gives us a taste of self-realization, who is well-versed in both the theoretical and practical knowledge (self-realization) deserves to be called a Sad-guru. How can he, who is himself devoid of self-realization, give it to the disciples? A Sad-guru does not, even in his dream, expect any service or profit from his disciples. On the contrary he wishes to serve them. He does not think that he is great and the disciple small. Not only he loves him as his son but regards him as equal to himself or as Brahma. The main characteristic of a Sad-guru is that he is the abode of peace. He is never restless nor ruffled. He has no pride of his learning. The poor and the rich, the small and the great, are the same to him.