८.१७: २६३.३प्रयत्नःसंरम्भौत्साहैतिप्रयायाः। सद्विविधोजीवनपूर्वःिच्छाद्वेषपूर्वकश्च । तत्रजीवनपूर्वख्॑सुप्तस्यप्राणापानसन्तानप्रेरकःप्रबोधकालेचान्तह्करणस्येन्द्रियान्तरप्राप्तिहेतुः ।
८.१७: २६३अस्यजीवनपूर्वकस्यात्ममनसोःसम्योगाद्धर्माधर्मापेक्षादुत्पत्तिः। इतरस्तुहिताहितप्राप्तिपर्हिहारसमर्थस्यव्यापारस्यहेतुःशरीरविधारकश्च ।
८.१७: २६३सचातम्मनसोःसम्योगादिच्छापेक्षाद्द्वेषापेक्षाद्वोत्पद्यते ॥
Prayatna ‘Effort’ is synonymous with ‘samrambha’ and ‘utsaha’. This is of two kinds : (1) that proceeding from mere living, and (2) proceeding from desire and aversion. The former is that which in the sleeping man carries on the upward and downward breathing (inhalation and- exhalation) and at the moment of awakening brings about the contact of the mind with the various organs of perception., This effort is the direct result of the contact of the soul and mind aided by Dharma and Adharma, The second kind of effort is the cause of activities: leading to the obtaining of the desirable and the abandoning of the undesirable object; and it also conduces to actions calculated. to keep the body in a state of steady equilibrium; this effort proceeds from the contact of the soul and mind, aided by desires and by aversions (vi-ii~14 ; v-i-i ; v ii-14; I-i-6).