Sextus Empiricus, Adversus Mathematicos

(τήρησις γάρ ἐστιν ἐπὶ φαινομένοις ὡς γεωργία καὶ κυβερνητική, ἀφʼ ἧς ἔστιν αὐχμού· τε καὶ ἐπομβρίας λοιμούς τε και σεισμοὺς καὶ ἄλλας τοιουτώδεις τοῦ περιέχοντος μεταβολὰς προθεσπί- ζειν), ἀλλὰ πρὸς γενεθλιαλογίαν, ἣν σεμνοτέροις κοσμοῦν- τες ὀνόμασιν οἱ Χαλδαῖοι μαθηματικοὺς καὶ ἀστρολόγους σφᾶς αὐτοὺς ἀναγορεύουσιν, ποικίλως μὲν ἐπηρεάζοντες τῷ βίῳ, μεγάλην δʼ ἡμῖν ἐπιτειχίζοντες δεισιδαιμονίαν. μηδὲν δὲ ἐπιτρέποντες κατὰ τὸν ὀρθὸν λόγον ἐνεργεῖν.

(for it is an observation of phenomena, like farming and navigation, from which one can foretell droughts and heavy rains, plagues and earthquakes, and other such changes in the surrounding air), but against the casting of nativities, which the Chaldaeans adorn with grander names, proclaiming themselves 'mathematicians' and 'astrologers'; they abuse life in many ways, raise a great superstition against us like a fortress, and allow us to do nothing according to right reason.