The last four are always observed by the pious who aspire to attain to the region of the celestials. The men of pure soul should observe these eight (paths).
उत्तरो देवयानस्तु सद्भिराचरितः सदा। अष्टाङ्गेनैव मार्गेण विशुद्धात्मा समाचरेत्॥