[Nimbarka does not explain what exactly the aprakrta is, nor does he define kala more precisely, beyond noticing, as pointed out above, that the aprakrta and the kala are species of the acit.But, Purusottamacarya of the Nimbarka school has, in his Vedantaratna-manjusa, described acit aprakrta as the material cause of the dhama (celestial abode) of Brahman and the bodies and ornaments etc.of Brahman and his associates.]