God gives everyone a measure of faith. When they start out in Christianity. And its easy to believe certain parts of the bible. But after we change the easy beliefs like "Is there a God". Then we start seeing things in scripture that we don't believe. If you want your faith to grow you must start changing your beliefs. If you see something that you don't believe that reveals an unclean spirit in you. Its up to you to resist that spirit and change your beliefs. The devil will always be there telling you "Oh it doesn't mean that".
Rom 12:3-4
3 For I say, through the grace given to me, to everyone who is among you, not to think of himself more highly than he ought to think, but to think soberly, as God has dealt to each one a measure of faith.
4 For as we have many members in one body, but all the members do not have the same function,
(NKJ)
The more of the Word that you believe the stronger your faith is.
Rom 10:17
17 So then faith comes by hearing, and hearing by the word of God.
(NKJ)
Rom 12:3-4
3 For I say, through the grace given to me, to everyone who is among you, not to think of himself more highly than he ought to think, but to think soberly, as God has dealt to each one a measure of faith.
4 For as we have many members in one body, but all the members do not have the same function,
(NKJ)
The more of the Word that you believe the stronger your faith is.
Rom 10:17
17 So then faith comes by hearing, and hearing by the word of God.
(NKJ)