Psalm 18:30-32

As for God, His way is blameless. The word of the Lord is tested (it is perfect, it is faultless); He is a shield to all who take refuge in Him. For who is God but the Lord? Or who is a rock, except our God, the God who encircles me with strength and makes my way blameless. 

The word of the Lord is tested and faultless. We are to use the word as a shield and a source of protection in our daily lives. God hears our prayers of faith and instills in us courage and strength through our confessions of faith. We are to speak to our mountains and watch as God turns them into mole hills.