'We have said that time is the sine qua non of the succession of mental states. To every separate state of consciousness [citta]…there are three phases - genesis (uppada), development (thiti), and dissolution (bhanga). Each of these three phases occupies an infinitesimal division of time - an instant (khana)… and together form one mental moment (cittakkhana)…There are more than one billion of such thought moments in the time that would be occupied by the shortest flash of lightning…Seventeen thought moments are held to be requisite for a complete process of consciousness…Buddhists speak of matter as lasting seventeen thought moments.' (Shwe Zan Aung, Compendium of Buddhist Philosophy, p 25) --- It is this momentariness that is not found in the Suttas, yet many in Theravadan circles (especially the modern vipassana meditation movement) build their meditation method partly on this foundation. This speculative momentariness-view becomes what they expect to see, but it is a phantasm.