प्राण एव ब्रह्मणश्चतुर्थः पादः स वायुना ज्योतिषा भाति च तपति च् भाति च तपति च कीर्त्या यशसा ब्रह्मवर्चसेन य एवं वेद ॥ ३.१८.४ ॥
In plain words
The breath is one of the four feet of Brahman; it shines and burns with the wind for its light. He who knows this shines and burns with renown, with glory and with the lustre of Brahman.