समादितं क्षणं किज्चिद् ध्यानवर्त्मनि तिष्ठति । पुनर्वायुपथं भ्रान्तं मनो भवति वायुवत्,एकाग्र करनेपर कुछ देर तो वह ध्यानमें स्थित रहता है; परंतु फिर नाड़ी मार्ममें पहुँचकर भ्रान्त-सा होकर वायुके समान चंचल हो उठता है
samāditaṁ kṣaṇaṁ kiñcid dhyānavartmani tiṣṭhati | punar vāyupathaṁ bhrāntaṁ mano bhavati vāyuvat ||
Bhishma said: When the mind is first gathered and set to practice, it remains for a brief moment upon the path of meditation. But then, straying again into the course of the vital winds, it becomes confused and, like the wind itself, turns restless and unsteady.
भीष्म उवाच
Even after initial concentration, the mind tends to slip back into habitual restlessness; therefore sustained practice and disciplined regulation of the inner energies (prāṇa/vāyu) are needed for stable meditation.
In Bhishma’s instruction in the Śānti Parva, he describes a meditator’s common experience: the mind briefly becomes one-pointed, then wanders again, becoming fickle like the wind.