Here Jnana is given importance. The Upanishads speak of monism. All Vedas have Upanishads. Upa means near. Ni means devoutly and shad means sitting. Therefore, knowledge is passed from Guru to Shisya when the latter sits near Guru is Upanishad. It is also called Rahasya-secret knowledge. The Upanishads appearing in the Vedas are of five types. 1. Mukya Upanishad: Upanishad Principle. Shankaracharya commented on this. These are 1126 in numbers. These Upanishads were created over hundreds of years. Of all these popular Upanishads there are 108. Out of 108, 12 are major Upanishads: Aitareya, Brihadaranyaka, Chandogya, Katha, Kena, Kaivalya, Mundaka, Mandukya, Ishavasya, Prashna, Shvetavatara, Taittiriya Upanishad2. Shaiva Upanishad-Lord Shiva is the supreme Lord.3.Vaishnava Upanishad-Vishnu is considered the Supreme Lord.4. Sanyasa Upanishad: It is told what the life of a renunciate or a sanyasi is5. Yoga Upanishads-There are twenty of them