18.8 Although actions constitute the indirect menas for release, yet they produce mental depression, since they can be done only by collecting materials involving painful effort and since they cause bodily strain on account of their reiring strenuous exertion. If, on account of such fear, one decides that the practice of knowledge alone should be tried for perfection in Yoga, and abandons actions like the great sacrifices applicable to one's station in life, he practises renunciation rooted in Rajas. Since that is not the meaning of the Sastras, one cannot win the fruit of renunciation in the form of the rise of knowledge. So it will be shown further one:  'That reason by which one erroneously knows, O Arjuna, is Rajasika' (18.31). In fact, actions do not directly cause purity of the mind but indirectly by winning the grace of God.