This divergence from the Yoga-sutra is not surprising, as mythological tales inform us that Patanjali was a serpent who overheard Shiva revealing the secret of yoga to Shakti. Shiva is a hermit. His path is suitable for the tapasvi who does not wish to engage with the world. Krishna speaks to the yajamana, the householder, and the whole point of yoga is to facilitate engagement with the world. If the tapasvi is focussed on the inner journey, and if the yajamana is focussed on the outer journey, then the yogi takes the inner journey in order to be better at the outer journey.
