"to him shall you hearken": even if he tells you to transgress (temporarily) one of the mitzvoth of the Torah, as in the instance of Eliyahu on Mount Carmel, if (in his judgment) the time requires it, listen to him.
(Devarim 18:16) "As all that you asked from the L-rd your G-d in Chorev": By this they merited that prophets arise for them, viz. (Ibid.) "I shall not continue to hear the voice of the L-rd my G-d." (Ibid. 17) "And the L-rd said to me: They have done well in speaking as they did.": They have anticipated the "Divine Intelligence," viz.