Elijah's intention, which was by no means “to prove to the king that he (Ahab) and not Elijah had brought Israel into trouble” (Vat., Seb. Schm.), but to put before the eyes of the whole nation a convincing practical proof of the sole deity of Jehovah and of the nothingness of the Baals, that were regarded as gods, and by slaying the priests of Baal to give a death-blow to idolatry in Israel.
Verse 21
Elijah addressed the assembled people as follows: “How long do ye limp upon both sides? Is Jehovah God, then go after Him; but if Baal be God, then go after him” - and the people answered him not a word. They wanted to combine the worship of Jehovah and Baal, and not to assume a hostile attitude towards Jehovah by the worship of Baal; and were therefore obliged to keep silence under this charge of infatuated halving, since they knew very well from the law itself that Jehovah demanded worship with a whole and undivided heart (Deu 6:4-5). This dividing of the heart between Jehovah and Baal Elijah called limping הסּעפּים שׁתּי על, “upon the two parties (of Jehovah and Baal).” For סעפּים the meaning “divided opinions, parties,” is well established by the use of סעפים in Psa 119:113; and the rendering of the lxx ιγνύαι, the hollow of the knee, is only a paraphrase of the sense and not an interpretation of the word.
Verses 22-25
As the people adhered to their undecided double-mindedness, Elijah proposed to let the Deity Himself decide who was the true God, Jehovah or Baal. The prophets of Baal were to offer a sacrifice to Baal, and he (Elijah) would offer one to Jehovah. And the true God should make Himself known by kindling the burnt-offering presented to Him with fire from heaven, and in this way answering the invocation of His name. This proposal was based upon the account in Lev 9. As Jehovah had there manifested Himself as the God of Israel by causing fire to fall from heaven upon the first sacrifice presented in front of the tabernacle and to consume it, Elijah hoped that in like manner Jehovah would even now reveal Himself as the living God. And the form of decision thus proposed would necessarily appear all the fairer, because Elijah, the prophet of Jehovah, stood alone in opposition to a whole crowd of Baal's prophets, numbering no less than 450 men. And for that very reason the latter could not draw back, without publicly renouncing their pretensions, whether they believed that Baal would really do what was desired, or hoped
