B.G 6.33
arjuna uvāca,
yoyaṁ yogastvayā proktaḥ sāmyena madhusūdana। etasyāhaṁ na paśyāmi cañcalatvātsthitiṁ sthirām ॥33॥
Arjuna said:
O Madhusudana, I cannot perceive the unwavering state of this Yoga of seeing equally (your presence everywhere) spoken by you, because of its restlessness.
Gīta Bhāshya 6.33
Restlessness refers to that of the mind. The importance of practice and dispassion in stabilizing the mind is highlighted by quoting Vyasayoga.
etasya yogasya sthirāṁ sthitiṁ na paśyāmi। manasaḥ caścañcalatvāt। uktaṁ ca
Because of the restlessness of the mind, I do not see the firm steadiness of this yoga. It has been said —
"manasaścañcalatvāddhi sthitiryogasya vai sthirā। vinābhyāsānna śakyā syādvairāgyādvā na saṁśayaḥ॥"
"Due to the restlessness of the mind, the firm steadiness of yoga is not possible without practice and dispassion. Indeed, there is no doubt about it."
iti vyāsayoge ॥33॥
- thus stated in Vyāsayoga.