Revelation 3.20 tells us that Jesus stands at our door and knocks. Ever thought that the devil might try and impersonate him? One of the toughest things for Christians is to figure out when the good is talking or when the bad might be playing a little game with you.
The only way to tell the difference is open the door, and start listening. discerning.
Be aware, even skeptical. Don't trust easy, and test everything against Scripture. Before you know it, you'll be very much on the right path.