What comes into our minds when we think about God is the most important thing about us.
There is no other way to determine the difference between the will of God and the crafts of satan... Jesus is the way, the truth and the life... The Holy Spirit of God is the Comforter...
If anything or anyone removes peace from you or inflicts confusion and judgment on you, this thing or person is not of God regardless of whether or not that person or thing has wrapped itself/himself in the wrapping paper with God's face printed all over it. Don't stop believing in God but stop believing in that person, in that thing. The wrapping paper with God's face stamped all over it isn't really God.
When you are posessed by evil spirits, it is crafty manipulations that you follow; but when you are posessed by the Holy Spirit of God, it is wise discretions you pursue!