 For centuries before Vasubandhu, Buddhist philosophers of the Sarvāstivādin tradition had believed in, and argued for, the doctrine of universal  momentariness.[24]  This view was a Buddhist scholastic interpretation and expression of the Buddha’s doctrine that all things in the world of ordinary beings were subject to causes and conditions, and therefore impermanent. Buddhists rejected the notion of substances with changing qualities, and affirmed instead that change was logically impossible. To be, for Buddhists, is to express certain inalienable characteristics, whereas to change must be to exhibit the nature of a different being. Vasubandhu adopts this view, employing it in many contexts: “As for something that becomes different: that very thing being different is not accepted, for it is not acceptable that it differs from itself.” (AKBh 193.9–10)