3.39 The knowledge, having the self for its subject, of this embodied person (the Jiva) whose nature is knowledge, is enveloped by this constant enemy in the shape of desire, which brings about attachment for sense-objects. This desire is difficult to satisfy, i.e., has for its object things unworthy of attainment and is insatiable, i.e., never attains satisfaction.

Now listen to what constitutes the instruments with which desire subdues the self. Sri Krsna goes on to expound this: