You have also given me the shield of Your salvation; Your right hand has held me up, Your gentleness has made me great. You enlarged my path under me, So my feet did not slip. —Psalm 18:35-36
The Lord will strengthen you and shield you to fight in battles in life, and He will make your path easy that you wont stumble.
Whenever I am afraid, I will trust in You. In God (I will praise His word), In God I have put my trust; I will not fear. What can flesh do to me?—Psalm 56:3-4
In this Psalm, David expressed his fear, but he kept his faith in God because He knew the only one he should fear is God alone, not his enemies. He also kept his faith in God because God is his salvation and his victory to every battle.