פירוש על דברים 18:14

לא כן נתן לך ה' אלהיך BUT NOT SO HATH THE LORD THY GOD SUFFERED THEE [TO DO] — i.e. to hearken unto מעוננים and קוסמים, for you see, He has made His Divine Presence dwell upon the prophets and upon the “Urim and Thummim” (and these will, if necessary, inform thee of what God has in store for thee).

ואתה לא כן נתן לך, even if you were to consult the various types of soothsayers listed here, their messages would never prove accurate as our sages already told us אין מזל לישראל, “no part of Israel’s destiny is linked to astrological constellations.” (Shabbat 156)

כי הגוים האלה..ישמעו, "For these nations..will hearken to, etc." This means that the Gentiles are forced to resort to astrologers and diviners who will tell them what the horoscope -forecasts; not so you, however. Forecasts based on horoscopes do not have the same meaning for you as they have for them as you have recourse to the prophets.