Ramana MaharshiAbiding in one’s natural consciousness, ‘I am’, is samadhi. Being freed from the adjunct-mixed awareness [‘I am so-and-so’, ‘I am the body’, ‘I am a man’, ‘I am this or that’ and so on], firmly abide in this boundless state [of real samadhi].

Ramana Maharshi

Jñāna Yoga
Path of Knowledge
(Also called brahmavidyā or jñāna-kāṇḍa, found in last section of Vedas - being the Upaniṣads)

Recommended method of starting with Jñāna Yoga is to refer to the beginning sections of explanatory texts (prakaraṇa granthās) like:

References: