Bhagavad Gita · Chapter 6: The Path of Meditation
Bhagavad Gita 6.33
योऽयं योगस्त्वया प्रोक्तः साम्येन मधुसूदन ।
एतस्याहं न पश्यामि चञ्चलत्वात् स्थितिं स्थिराम् ॥
yo'yaṃ yogastvayā proktaḥ sāmyena madhusūdana | etasyāhaṃ na paśyāmi cañcalatvāt sthitiṃ sthirām ||
This yoga of evenness that you have described, Krishna: I cannot see how it can last, because the mind is so restless.
Modern context
Arjuna speaks for every honest beginner. The teaching is beautiful, but I cannot see how it could last, because my mind is so restless. This is not cynicism. It is someone who has tried to sit still and knows what happens. The Gita deserves credit for putting this objection into the text. A teaching that cannot hear 'this doesn't work for me' is not worth much.