Great problem

⁴ A champion named Goliath, who was from Gath, came out of the Philistine camp. His height was six cubits and a span.^{[a] 5} He had a bronze helmet on his head and wore a coat of scale armor of bronze weighing five thousand shekels^[b]; ⁶ on his legs he wore bronze greaves, and a bronze javelin was slung on his back. ⁷ His spear shaft was like a weaver’s rod, and its iron point weighed six hundred shekels.^[c] His shield bearer went ahead of him.
⁸ Goliath stood and shouted to the ranks of Israel, “Why do you come out and line up for battle? Am I not a Philistine, and are you not the servants of Saul? Choose a man and have him come down to me. ⁹ If he is able to fight and kill me, we will become your subjects; but if I overcome him and kill him, you will become our subjects and serve us.” ¹⁰ Then the Philistine said, “This day I defy the armies of Israel! Give me a man and let us fight each other.” ¹¹ On hearing the Philistine’s words, Saul and all the Israelites were dismayed and terrified.
¹² Now David was the son of an Ephrathite named Jesse, who was from Bethlehem in Judah. Jesse had eight sons, and in Saul’s time he was very old. ¹³ Jesse’s three oldest sons had followed Saul to the war: The firstborn was Eliab; the second, Abinadab; and the third, Shammah. ¹⁴ David was the youngest. The three oldest followed Saul, ¹⁵ but David went back and forth from Saul to tend his father’s sheep at Bethlehem.

Here described a very huge obstacle that Israel was facing. The obstacle was so great that no one dared to apprach him. He was strong and powerful, so strong and powerful that everyone was terrified of him. 

Ask: How powerful is our God? Is He not more powerful than this guy? This guy is just a person while God is in heaven and is all powerful? Can we not believe that God can slay our enemies? God is the King of all Kings, Lord of all Lords. This guy here is NO match for God and His unending strength and power. All we need to do is to harness His strength, recognize that we are His and use His strength to overcome this obstacle. 

It is actually difficult for us to comprehend that something unseen can be so powerful. But it is by faith that God created the earth, it is by faith that He is Lord. Then He reigns. We should not be like the Israelites, fear of obstacles, but harness God's strength because of our Godly identity.