Sri Krishna says that an individual, self-controlled and serene, who contemplates constantly on the nature of the Self in all circumstances in life, soon gets full divine satisfaction and becomes an unshakeable Yogi.

Knowledge gained by study of Sastras is Gnana and one’s own experience of the teachings of Sastras is Vignana. Kootastha is the anvil. Red hot iron pieces are hammered on the anvil for giving proper shape to them but the anvil itself remains unchanged in spite of receiving repeated hammerings. So too, the seeker is called changeless- Kootastha- whose heart remains unchanged in spite of it being surrounded by the worldly objects. He is unperturbed by things and happenings of the world and is therefore said to be equal-minded to the events of this changing world. Such a saint remains tranquil with equal mental vision in all conditions of life. To him a clod of mud, a stone and gold are all the same. Thus equanimity of mind is the touchstone for spiritual evolution.

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A yogi, jnana-vijnana-trpta-atma, whose mind is satisfied with knowledge and realization-jnana is thorough knowledge of things presented by the scriptures, but vijnana is making those things known from the scriptures a subject of one’s own realization just as they have been presented; he whose mind (atma) has become contented (trpta) with those jnana and vijnana is jnana-vijnana-trpta-atma-; kutasthah, who is unmoved, i. e. who becomes unshakable; and vijita-indriyah, who has his organs under control;- he who is of this kind, ucyate, is said to be; yuktah, Self-absorbed. That yogi sama-losta-asma-kancanah, treats equally a lump of earth, a stone and gold. Further,