mind ceases its restless movements – Gita

“The light of a lamp does not flicker in a windless place: that is the simile which describes a yogi of one-pointed mind, who meditates upon the Atman. When, through the practice of yoga, the mind ceases its restless movements, and becomes still, he realizes the Atman. It satisfies him entirely. Then he knows that infinite happiness which can be realized by the purified heart but is beyond the grasp of the senses.”

~ Bhagavad Gita