एकाग्रता निरोधो वा मूढैरभ्यस्यते भृशं। धीराः कृत्यं न पश्यन्ति सुप्तवत्स्वपदे स्थिताः॥१८- ३३॥
The ignorant make a great effort to practice one-pointedness and the stopping of thought, while the wise see nothing to be done and remain in themselves like those asleep.