(38) If a man's thoughts are unsteady, if he does not know the true law, if his peace of mind is troubled, his knowledge will never be perfect.

(13) 'A wise man should keep down speech and mind; he should keep them within the Self which is knowledge; he should keep knowledge within the Self which is the Great; and he should keep that (the Great) within the Self which is the Quiet.'

(289) A wise and good man who knows the meaning of this, should quickly clear the way that leads to Nirvâna.

(7) Therefore it is that whenever there is great confusion, love of knowledge is ever at the bottom of it. For all men strive to grasp what they do not know, while none strive to grasp what they already know; and all strive to discredit what they do not excel in, while none strive to discredit what they do excel in. The result is overwhelming confusion. Thus, above, the splendour of the heavenly bodies is dimmed; below, the energy of land and water is disturbed; while midway the influence of the four seasons is destroyed. There is not one tiny creature which moves on earth or flies in air but becomes other than by nature it should be. So overwhelming is the confusion which desire for knowledge has brought upon the world ever since the time of the Three Dynasties downwards! The simple and the guileless have been set aside; the specious and the false have been exalted. Tranquil inaction has given place to a love of disputation; and by disputation has confusion come upon the world.

(24) 'But he who has not first turned away from his wickedness, who is not tranquil, and subdued, or whose mind is not at rest, he can never obtain the Self (even) by knowledge!

(89) Those whose mind is well grounded in the (seven) elements of knowledge, who without clinging to anything, rejoice in freedom from attachment, whose appetites have been conquered, and who are full of light, are free (even) in this world.

(13) To that pupil who has approached him respectfully, whose thoughts are not troubled by any desires, and who has obtained perfect peace, the wise teacher truly told that knowledge of Brahman through which he knows the eternal and true Person.