the insensate stones nodding in agreement [said of persuasive powers]/他的话说得非常透彻，简直能使～。His words really drove the point home so that even the insensate stonesnodded in agreement.
顽石点头wan shi dian tou
(be so persuasive as to make) the insensate stones nod in agreement
顽石点头wán shí diǎn tóu
形容道理讲得非常透彻，连顽石之类无知觉的东西都不得不点头赞同。the insensate stones nod in agreement, One’s spoken words might have melted a stone.