Prashnopanishad Pranayama Mantra.

Commentary on the pranayama mantra , Prashnopanishad, ch. 2, vs.13.

प्राणस्येदं वशे सर्वं त्रिदिवे यत्प्रतिष्ठितम् ।

मातेव पुत्रान्रक्शस्व श्रीश्च प्रज्ञां च विधेहि न इति ॥ १३ ॥

prāṇasyedaṃ vaśe sarvaṃ tridive yatpratiṣṭhitam |

māteva putrānrakśasva śrīśca prajñāṃ ca vidhehi na iti || 13 ||

Commentary on the pranayama mantra:

Between the metaphysical Consciousness (Shuddha Chaitanya) and the Gross physical material world, it is the prana that acts as a link between the 2 dimensions being both the catalyst and sutradhar facilitating the process of expression of life and evolution. The stability and functioning of our mind , the organs of perception and the organs of action is dependent on the level , intensity & stability of the prana within us. When enhanced by the practice of pranayama it protects us from chitta vikshepas & shat-ripus like a mother protects her children. On prana is dependent the sensitivity of our system, and on the sensitivity of our system is dependent our intelligence and on our intelligence is dependent our inner affluence. 

*-----An article by Rohit Pillai---* 

(The above article comes from the limited experience and knowledge of the author.  Just in case of any mistakes the author is open for criticism and corrections).