Jeremiah had questioned God’s righteousness (see Jeremiah 12:1 note); he is told, “If thou return,” if thou repent thee of thy doubts, and think only of thy duty, “then will I bring thee again, then will I cause thee again to stand before Me.” To stand before a person means to be his chief officer or vicegerent. It implies therefore the restoration of Jeremiah to the prophetic office.
If thou take forth the precious from the vile - i. e., if thou cause the precious metal to come forth from the dross. Jeremiah was to separate in himself what was divine and holy from the dross of human passion. Let him abandon this mistrust, this sensitiveness, this idea that God did not deal righteously with him, and then “he shall be as God’s mouth, i. e., as the organ by which God speaks.
Let them return ... - Rather, “they shall return unto thee, but thou shalt not return unto them.” A flattering prophet perishes with the people whom his soft speeches have confirmed in their sin: but the truthful speaking of God’s word saves both.