“The Hindu Veda classify Dhyāna into three major but not water-tight divisions:
1. Karma – actions, the details, precise actions and results of rituals, such as the how and where you sit; considered most important for Dhyāna.
2. Jñāna – inquiry, into anything from the lowest to the highest, such as God, myself, Prāṇa, Brahma, etc; recognising absolutely one object of inquiry, not many.
3. Bhakti – trying to connect myself with the highest force; to accept the absolute power of God – that he is Master and Teacher, the only reality.
Patañjali’s Yoga Sūtra, the definitive text on Yoga, classifies Dhyāna in different yet similar terms.”