18.21 Tu, but; viddhi, know; tat, that; jnanam, knowledge; to be rajasam, originating from rajas; yat, which; sarvesu bhutesu, amidst all things; vetti, apprehends-since knowledge cannot be an agent of hends-since knowledge cannot be an agent of action, therefore the meaning implied is, 'that, knowledge৷৷.through which one apprehends৷৷.'-; nana-bhavan, the different entities; prthagvidhan, of various kinds, i.e., those possessing diverse characteristics and different from oneself; prthakrvena, as distinct, as separate in each body.