12And the messenger who went to summon Micaiah said to him, “Behold, the words of the prophets with one accord are favorable to the king. Let your word be like the word of one of them, and speak favorably.” 13But Micaiah said, “As the LORD lives, what my God says, that I will speak.” 14And when he had come to the king, the king said to him, “Micaiah, shall we go to Ramoth-gilead to battle, or shall I refrain?” And he answered, “Go up and triumph; they will be given into your hand.” 15But the king said to him, “How many times shall I make you swear that you speak to me nothing but the truth in the name of the LORD?” 16And he said, “I saw all Israel scattered on the mountains, as sheep that have no shepherd. And the LORD said, ‘These have no master; let each return to his home in peace.'” 17And the king of Israel said to Jehoshaphat, “Did I not tell you that he would not prophesy good concerning me, but evil?” – 2 Chronicles 18:12-17
Have you ever asked the Lord a question when you already knew the answer? Ahab does something of the sort here. Four hundred people had already told him what he wanted to hear, but he knew and the king of Judah knew that there was something not quite kosher about the answer they gave. When they inquired of the one prophet who would tell them what the Lord really said and not what they hoped to hear, they ignored him anyway.
Well, actually he told them what they wanted to hear, but I am guessing his sarcasm was a little over the top. Like I said, they knew the real answer to the question. They knew what God thought of the whole thing; they just didn’t care. If you want to know God’s will or His wisdom, He will give it to you. It is there in His Word for all to see and understand. When you hear it and it doesn’t fit what you wanted to hear though, I would advise adjusting to God rather than hoping that you can go ahead and do your own thing. Observant readers will notice that Ahab is dead by the end of this particular chapter of the book.