 it must always be called by the same term. For it does not depart from its own character at all. It both continually receives all things, and has never taken on a form similar to any of the things that enter it in any way. For it is laid down by nature as a recipient of impressions for everything, being changed and formed variously by the things that enter it, and because of them it appears different at different times. (50b6–c4) 