Míngrén diǎntóu, jí zhī; chī rén quán dǎ, bù xiǎo.

明人點頭即知, 痴人拳打不曉。

Lit [A] clever person understands at a nod, [while a] stupid person won't understand [even when] beaten.

Fig “A nod is as good as a wink (to a blind horse).”

Note [See also the following entry.]

Topics CLEVERNESS STUPIDITY UNDERSTANDING