“Ekāgratā is compared to the sharp tip
of the steady flame of a Ghee Lamp
when not exposed to any wind.
In other words,
the mind should not move
anywhere else other than in the
direction fixed for Dhāraṇā.
Obviously the Viṣaya for Dhāraṇā
and Dhyānam should be the same.
The stronger the Dhāraṇā,
the steadier the Dhyānam.”
– T Krishnamacharya on Bhagavad Gītā Chapter Six verse 19