And if you look at the Upanishads, it really is referring to sitting close or near a teacher. There's a lot of dialogue between student and teacher. And the Upanishads in particular really form the spiritual core of Hinduism. It really focuses around spiritual philosophy. And amongst these four Vedas, there are 108 Upanishads. And 108 is considered a very auspicious number in Hinduism. Now you also have Brahmanas, which are commentary.