This knowledge of the all-pervading Soul should be delivered to one's son. It should be inculcated upto one who is of controlled Senses, who is honest in conduct, and. that is docile or submissive.
आत्मनो व्यापिनो ज्ञानमिदं पुत्रानुशासनम्। प्रयताय प्रवक्तव्यं हितायानुगताय च॥