Charles Ellicott Commentary Jeremiah 10:2

"thus saith Jehovah, Learn not the way of the nations, and be not dismayed at the signs of heaven; for the nations are dismayed at them." — Jeremiah 10:2 (ASV)

Be not dismayed at the signs of heaven. —The special reference is to the astrologers, the stargazers, the monthly prognosticators of the Chaldeans (Isaiah 47:13), finding portents either in the conjunction of planets and constellations, or in eclipses, comets, and other like phenomena. In singular contrast with the abject attitude of mind thus produced, the prophet shows that what has been called in scorn an anthropomorphic theology, was then the one effectual safeguard against the superstition that bows in fear before anything that is unusual and unexplained.