James 1:5-8

If any of you lacks wisdom, let him ask of God, who gives to all liberally and without reproach and it will be given to him. But let him ask in faith, with no doubting, for he who doubts is like a wave of sea driven and tossed by the wind. For let not that man suppose that he will receive anything from the Lord; he is double-minded man, unstable in all his ways.

Knowledge of God and His promises through the word will bring wisdom into our lives. When we gain understanding of God and His promises, our faith increases. When we believe in faith, the mountains move, and the obstacles disappear. We cannot let doubt enter into our thoughts and minds. Put up the shield of faith to quench the darts of doubt sent by the enemy.