Those are 2 different types of practice for 2 different levels of consciousness.
Cosmic consciousness: “The observer and the observed create a dualistic reality ["witnessing"]…” – DHYAN PPRACTICE Brahman consciousness: “…and the higher step of contemplation helps one to realize that one's real self is the Self of all.” – CONTENPLATION PRACTICE I don’t know how you can realize the second not doing first – not realizing turya, fourth. Transcendental, Samadhi…