What is dhyana yoga, the meditation practice in the Bhagavad Gita?

In the Bhagavad Gita's sixth chapter, dhyana yoga, Krishna gives Arjuna a concrete method for meditation rather than only philosophy. Verse 6.10 instructs the yogi to withdraw alone to a secluded place, controlling mind and body, free from expectation and from grasping after possessions (nirasih aparigrahah). Verses 6.11 to 6.13 add practical detail: a firm seat set on clean ground, neither too high nor too low, with the eyes, spine, and head held steady, gaze not wandering, mind concentrated on a single point. Verse 6.14 asks for a calm, fearless disposition and the vow of celibacy (brahmacari-vrate) traditionally associated with disciplined renunciation, with the mind fixed on Krishna as the highest goal. Verse 6.15 gives the payoff: through constant, disciplined practice (yukta) the yogi's mind becomes still, and that stillness leads to the peace that culminates in liberation, described as nirvana-paramam, supreme peace ending in Krishna. What makes chapter 6 distinctive within the Gita is that it treats meditation as a trainable skill with conditions that can be met or missed, not a mystical state that simply arrives. Krishna is explicit later in the same chapter, at 6.33-6.34, that Arjuna finds the mind restless and hard to control, and Krishna agrees this is difficult, but insists it can be mastered through abhyasa, repeated practice, and vairagya, dispassion. Dhyana yoga therefore sits alongside karma yoga and jnana yoga as one of the Gita's three interlocking paths, aimed at the same still, undivided awareness those other chapters describe from different angles.