Hello, hope you don't mind me posting. I belong to the fundy forum, but I beleive one has to have 50 posts to be a member over here and I am one slow poster hence no sign up.
Anyways, if you mind I will delete it.
In 1 Sam, as someone mentioned is the story of Saul going to a medium at Endor. Saul was on his last leg so to speak as he was about to fight the Philisitnes for the last time. Samuel had died (1 Sam 28:3) and God would not answer Saul about the upcoming battle in any way (1 Sam 28:6). So he was feeling quite alone before this battle.
Saul had previously expelled the mediums and wizards from the land (1 Sam 28:3) but he asked his servants to find a medium for him and they said there was one in Endor (1 Sam 28:7). Paul disguised himself and the medium was very cautious thinking this person was setting up a trap for her telling him how Saul had banned mediums from the land. Saul swore to her nothing of the sort was going on (she still didn't know it was Saul) and so she agreed and asked who should she bring up and he said Samuel (1 Sam 28:11).
Now this is where it gets interesting. The medium was not surprised when she saw Samuel, the text doesn't leave any impression of that one way or the other, she cried out when she saw Samuel because she now knew this man who asked this of her was in fact Saul (1 Sam 28:12). And later in the text she is still worried about what Saul will do to her as she tries to get him to eat (1 Sam 28:21-25).
The next interesting thing is that Saul could not see Samuel, only the meduim could (1 Sam 28:13,14). Saul after hearing of what she saw bowed down towards the ground.
Then Samuel asked Saul why he had disturbed him (1 sam 28:15) so it seems Saul could hear him.
Now some like to say that it was not Samuel, but some other spirit taking his appearance citing verse 13 and verse 19 which says "and tomorrow you and your sons shall be with me". On this it depends on where one thinks Saul and his sons would end up after death.
Against this view the text does say that it was Samuel and not just an appearance (1 Sam 28:12,14,15,16,20).
Now there are many verses against sorcery and mediums and how we are not to be apart of that and how people who partake of those things will not inherit the kingdom of God (for example Gal 5:19-21 Rev 21:8 Rev 22:15).
Demons and evil spirits are those which lay behind the ideas of idols and false gods and that those who worship and sacrafice to them are in fact sacrificing and worshiping demons (1 cor 10:20). And these demons and evil spirits do have some power and can perform signs, but they do so to deceive and draw away people from the power of God, a fasle power so to speak (Rev 2:4, 13:13,14 16:14, 19:20, 2 Thess 2:9 and others like Pharaoh's magicians in Exodus, but also see Elijah against prophets of Baal on Mt. Carmel 1 Kings 18:16-46).
So from the story of Saul and the medium of endor it is hard to conclude one way or the other. Was it really Samuel? Was it by the power of the medium? Hard to tell just from that passage. But we can say that evil powers do exist, that they deceive people, and as Christians we are not to meddle in these type of things.
And going back to the story about Saul, the message he received from Samuel was nothing new, he was already told that his kingship was being taken away and it was being confirmed upon David. Going to the medium didn't help him one bit, what God had decreed because of Saul's actions (1 Sam 28:18) weren't going to change no matter who he consulted. He was never strong in just trusting God, unlike David. A contrast that sticks out everywhere in 1 Samuel.