as a shuttle separates the warp from the woof, so a name distinguishes the natures of things. The weaver will use the shuttle well,—that is, like a weaver; and the teacher will use the name well,—that is, like a teacher.
Plato establishes the shuttle as the governing analogy for the instrument of intellectual differentiation, making it a figure for language’s capacity to divide and reveal essences.
, Cratylus, -388thesis