Job 9:6

The pillars thereof tremble - This also refers to an earthquake, and to that tremulous motion which sometimes gives warning of the approaching catastrophe, and from which this violent convulsion of nature has received its name. Earthquakes, in Scripture language, signify also violent commotions and disturbances in states; mountains often signify rulers; sun, empires; stars, petty states. But it is most likely that the expressions here are to be understood literally.

Which shaketh the earth out of her place - This evidently refers to violent convulsions of nature, as if the earth were to be taken away. Objects on the earth's surface become displaced, and convulsion seems to seize the world. The Septuagint renders this, "who shaketh that which is under the heavens from its foundations" - ἐκ Θεμελίων ek themeliōn. The change in the Hebrew would be very slight to authorize this rendering.

And the pillars thereof tremble - In this place the earth is represented as sustained like a building by pillars or columns. Whether this is a mere poetic representation, or whether it describes the actual belief of the speaker in regard to the structure of the earth, it is not easy to determine. I am inclined to think it is the former, because in another place where he is speaking of the earth, he presents his views in another form, and more in acoordance with the truth (see the notes at Job 26:7): and because here the illustration is evidently taken from the obvious and perceived effects of an earthquake. It would convulse and agitate the pillars of the most substantial edifice, and so it seemed to shake the earth, as if its very supports would fall.

9:6 The earth - Great portions of it, by earthquakes, or by removing islands. Pillars - The deep and inward parts of it, which like pillars supported those parts that appear to our view.