For example, in a commentary to the Brahma Sutras (III, 2, 38, and 41), Adi Sankara, argues that the original karmic actions themselves cannot bring about the proper results at some future time; neither can super sensuous, non-intelligent qualities like "adrsta"—an unseen force being the metaphysical link between work and its result—by themselves mediate the appropriate, justly deserved pleasure and pain. The fruits, according to him, then, must be administered through the action of a conscious agent, namely, a supreme being (Ishvara).