  Plato held that for Heraclitus knowledge is made impossible by the flux of sensible objects. Yet Heraclitus does not repudiate knowledge or the wisdom that comes from a proper understanding of the world. To be sure, he believes most people are not capable of wisdom; understanding is a rare and precious commodity, which even most reputed sages do not attain to (B28[a]). Yet wisdom is possible, and it is embodied in Heraclitus’ message, for those who can discern it.