Prophecy and Common Sense

Euripides, the playwright who was critical of traditional conceptions of the gods and much traditional religious practice--if you read many of his plays in a row, this aspect becomes very clear--says this in his play Helen. In a passage accusing prophets of merely spouting lies in order to make money, he writes in line 757:

γνώμη δ᾽ ἀρίστη μάντις ἥ τ᾽ εὐβουλία.

The best prophet is common sense, our native wit.

(Trans. Lattimore)