Change the way you look.
Because others saw Goliath as an invincible giant, but David was never afraid of him? Well, there is a simple but powerful answer to this question, and that is that while others had their eyes on the problem, David could doubtless eyes on the one who he knew could end the problem. Yes, when your eyes are not on God, everything that comes into your life that is not to your liking you will see it so great that you will not find a way out, however when your eyes are focused and fixed on God, no problem will be your concern. for you know that the God you trust is greater than anything.
That is why today I do not understand how many people who say they know God, serve him, can live worried about what happens or what may come, if we place our life and trust in God we must be sure that He will not allow it to happen in our life something that is not for a purpose. God cares for us, therefore everything that happens in our life will be his perfect will and we must adhere to that.
No matter how big the giant is before God, it will be nothing, we must learn to look at David, not to get out of focus, to know that with God on our side, we will be able to knock down any obstacle that may arise.
There is something that can determine each battle in your life, and it is the knowledge of God, this will also lead you to know yourself, to know what were the gifts and talents that God put in you, to multiply them, to see the life of a different way.
David had another expectation of life, another way of facing situations because from a very young age he had experienced the love and goodness of God, he was able to experience his power, knowing God gave him enough confidence to face the giant.
When you stop looking at the problems and the giants, to look at God, your life will change in a supernatural way, you will begin to walk in God's miracles for your life and you will experience his great power and what He can do with you. David trusted God without reservation and became king. A king after God's own heart.