James 1:6-8 But let him ask in faith, nothing wavering. For he that wavereth is like a wave of the sea driven with the wind and tossed. For let not that man think that he shall receive any thing of the Lord.
A double minded man is unstable in all his ways.
Galatians 1:6-8 I marvel that ye are so soon removed from him that called you into the grace of Christ unto another gospel: Which is not another; but there be some that trouble you, and would pervert the gospel of Christ. But though we, or an angel from heaven, preach any other gospel unto you than that which we have preached unto you, let him be accursed.
Mark 9:23 Jesus said unto him, If thou canst believe, all things are possible to him that believeth.