How is young Goodman Brown stupid?

I don't know that I
would describe young Goodman Brown as "stupid"; he is, perhaps, misguided and selfish,
but I wouldn't call him stupid.  He knows that he shouldn't go into the woods.  He knows that he
shouldn't leave his wife, Faith, who claims to be troubled with distressing dreams when she is
alone.  Brown even feels guilty for leaving her behind, and he advises her go to bed early and
say her prayers.  She hopes, for his sake, that he...