The devil's whole strategy is to get you to turn loose of your faith in God and His Word.
Some people are like seed along the path, where the word is sown.
As soon as they hear it, Satan comes and takes away the word that was sown in them. Only when it seems untrue. People don't turn loose of what they believe is true. So, to steal the Word, the devil must convince people it's not true. The devil does this by getting us to focus on what our senses tell us, instead of on God's Word, the seed which changes our circumstances when we retain it.