10. set thee over--literally, "appointed thee to the oversight." He was to have his eye upon the nations, and to predict their destruction, or restoration, according as their conduct was bad or good. Prophets are said to do that which they foretell shall be done; for their word is God's word; and His word is His instrument whereby He doeth all things (Ge 1:3; Ps 33:6, 9). Word and deed are one thing with Him. What His prophet saith is as certain as if it were done. The prophet's own consciousness was absorbed into that of God; so closely united to God did he feel himself, that Jehovah's words and deeds are described as his. In Jer 31:28, God is said to do what Jeremiah here is represented as doing (compare Jer 18:7; 1Ki 19:17; Eze 43:3).
      root out-- (Mt 15:13).
      pull down--change of metaphor to architecture (2Co 10:4). There is a play on the similar sounds, linthosh, linthotz, in the Hebrew for "root out . . . pull down."
      build . . . plant--restore upon their repenting. His predictions were to be chiefly, and in the first instance, denunciatory; therefore the destruction of the nations is put first, and with a greater variety of terms than their restoration.

JFB.