1 Kings 22:20 And the LORD said, Who shall persuade Ahab, that he may go up and fall at Ramothgilead? And one said on this manner, and another said on that manner. 21 And there came forth a spirit, and stood before the LORD, and said, I will persuade him. 22 And the LORD said unto him, Wherewith? And he said, I will go forth, and I will be a lying spirit in the mouth of all his prophets. And he said, Thou shalt persuade him, and prevail also: go forth, and do so.
It looks like to me that this lying spirit presented itself before the Lord and then the Lord chose to send it to go forth as per God's plan to destroy Ahab. Kinda looks like a "Hey God can I". This was a lying spirit that is different than a familar spirit. Do you really think that God did not know who would entice Ahab? The question was a more so who will I choose being more pondering then literally asking a question. God is omniscient so He already knew this lying spirit would volunteer to do evil.
Yeah - it looks like indeed a lying spirit said "Hey God can I", but what is a familiar spirit to you if not a lying spirit???
Were you not saying that this medium had a spirit that would pretend to be someone else? If so that is a lying spirit!
And absolutely, God is omniscient and so knows what is going to happen. He knew what Saul would do, what the woman would do, and what the spirits would do. In the case of Ahab, we see that God sent a lying spirit. That was the account recorded in the Bible. In the case of Saul He sent Samuel. That was the account recorded in the Bible. In both cases the king was warned (got correct prophecy). David too got correct prophecy after he had sinned. There was a difference though. David made a sacrifice and repented, and the Bible records that the Lord then held back from fulfilling His plan.
The points are; that there are conversations in the heavens, and the Lord is Lord of lord and King of kings. He rules and does what He wants. He can send a lying spirit of which a 'familiar spirit' pretended to be someone else is. Or He can have show up in spirit a prophet of old, like on the mountain of transfiguration or in the story of Saul. He, God warns people to see if they will repent and turn back to Him. He always does that, even as He goes about punishing people. And God might change His mind, because of His mercy.
And we have a record, a correct record I might add, of all this. It reads how it reads. Ok, sometimes things are not always perfectly clear to us when we read them. Was it a lady with a "familiar spirit" or was she a "medium". It depends upon which translation you read, but are they not the same thing. Never-the-less the Bible records it was Samuel who spoke, and the prophecy was not a lie!
This does not mean people should run off to mediums to find out what happens. Do they also want the same type of prophecy about their death that Saul got? Perhaps they would be lied to and told everything was going to be ok when it wasn't? It does mean that people need to listen to the Lord. That was what got Saul and Ahab, and even David into trouble. It is what always get us into trouble. If we don't listen, and we don't at times, we are going to pick up trouble from the Lord.
Jer 6:19 "Hear, O earth: behold, I am bringing disaster on this people, The fruit of their plans, Because they have not listened to My words, and as for My law, they have rejected it also.
That is what got Saul, Ahab, and even David into trouble. So what are we to do? The answer should be that we repent and turn back to the Lord and fall upon His mercy, and keep seeking Him and His voice. David and Jeremiah understood this, where as Saul and Ahab didn't, and too many other of God's people (Christians) don't.
Jer 6:26 O daughter of my people, put on sackcloth and roll in ashes; Mourn as for an only son, a lamentation most bitter. For suddenly the destroyer will come upon us.
We, even we who have gotten instructions from the Lord, get stubborn and rebellious. That is what the story of Saul is about. It is about us. Then we don't repent even though God, brings calamity on us. So are we going to return in sackcloth (an attitude of repentance) to the Lord and place our hope in His mercy, or are we in our pride still going to race on to the battlefield?
The story of king Saul is not really a story about not going to mediums, though it didn't work for Saul even when God sent Samuel, according to what was written. It is a story of our pride causing us to not listen to the Lord and not repent when we have messed up. It is a sad story, but it is the story of how we tend to act.