Sanskrit: तस्मै स होवाचातिप्रश्नान् पृच्छसि ब्रह्मिष्ठोऽसीतितस्मात्तेऽहं ब्रवीमि  
English:  2  To him the teacher replied: You are asking difficult questions; you must be exceedingly devoted to Brahman. Therefore I will answer you. 