Because it is so, therefore,
विहाय कामान्यः सर्वान्पुर्मांश्चरति निःस्पृहः ।
निर्ममो निरहङ्कारः स शान्तिमधिगच्छति ॥ ७१ ॥
vihāya kāmānyaḥ sarvānpurmāṃścarati niḥspṛhaḥ .
nirmamo nirahaṅkāraḥ sa śāntimadhigacchati .. 71 ..
Read the commentary
That man of renunciation, who, entirely abandoning all desires, goes through life content with the bare necessities of life, who has no attachment even for those bare necessities of life, who regards not as his even those things which are needed for the mere bodily existence, who is not vain of his knowledge,—such a man of steady knowledge, that man who knows Brahman, attains peace (nirvana), the end of all the misery of samsara (mundane existence). In short, becomes the very Brahman.
Knowledge leads to Divine Felicity
This devotion to knowledge is extolled as follows :