Kaivalya Upaniṣad 14

Mantra 5 establishes the need for meditation and talks about the basic preliminaries. Mantra 6 & 7 are meditative and contemplative verses which simultanously are teachings as well. This episode points out the three different types of adhikari-s, the two types of pratibandhika-s, inhibitive factors in the way of knowledge, the three process of knowing- sravanam, mananam and nididhyasanam and further Swaminiji beautifully elucidate the mahāvākya, 'tat tvam asi' -That Thou Art.