The simple believe every word, but the shrewd watch where they step.
In context
13Even in laughter the heart may ache, and the end of joy is grief. 14The one whose heart turns away gets his fill of his own ways, and a good man of his. 15The simple believe every word, but the shrewd watch where they step. 16The wise man fears and turns from evil, but the fool rages on, sure of himself. 17A quick temper does foolish things, and a man of schemes is hated.
