Which of the following is most closely associated with Raja-Yoga?

The association between Raja-Yoga and the Yoga Sutras of Patanjali is rooted in Patanjali’s comprehensive framework for understanding yoga as a disciplined practice for mental control and spiritual development. The Yoga Sutras articulate an eight-limbed path (Ashtanga Yoga), which includes ethical precepts, postures, breath control, sensory withdrawal, concentration, meditation, and ultimately liberation. This systematic approach emphasizes the importance of mental discipline, self-control, and meditation, which are core components of Raja-Yoga.

The other texts listed provide valuable insights and teachings related to different forms of yoga or philosophical concepts, but they do not encapsulate the structured, meditative focus of Raja-Yoga as effectively as the Yoga Sutras. The Hathayoga Pradipika primarily deals with physical postures and practices, the Bhagavad Gita addresses duty and action within the context of devotion and selfless action, and the Rig-Veda consists of hymns that are foundational to Vedic tradition but do not specifically outline the discipline of Raja-Yoga. Therefore, the Yoga Sutras of Patanjali serve as the essential text that aligns most closely with the principles and practices of Raja-Yoga.