If you ever participated in a séance or watched a medium on television, you know they say things like: Grandma is glad you are living in her house. Dad wants you to know he loves you. Uncle Billy is glad you are working where he worked. Your daughter is happy that you remarried.
What are the chances that all those people would actually be happy about those things? I can imagine Grandma saying, “Why did you sell my teapot collection on eBay?” I can hear Dad saying, “Have you changed the oil in your car?” I can hear Uncle Billy saying, “Why are you working there? Go to college, you screwball!” And I can hear your daughter saying, “How could you remarry already? Mom’s only been dead for a year!”
Why don’t you hear that stuff? Because generally, the speaker is not telling you the truth. He’s either a fraud — making things up. Or he’s demonically motivated — lying because he wants you to believe in something other than God.
There are many reasons that Jesus is better than a spiritist. One reason is that while a spiritist will be glad to tell you want you want to hear, Jesus (the Way, the Truth, and the Life) will never lie to you.
This podcasts speaks of this and some other reasons Jesus is better.