In the Brihadaranyaka Upanishad, there is a conversation between the great sage Yajnavalkya and his wife Maitreyi in which he said to her: “The Self, my dear Maitreyi, should verily be realized. How? “It should be heard of, reflected on and meditated upon. By the realization of the Self alone, my dear, through hearing, reflection, and meditation, all this is known.”