If you trust the world, you will be filled with uncertainty and doubt. You will be filled with cynicism and anxiety. But as you trust in God you will be filled with joy from knowing who your provider is and peace from having your expectations centered on the God who spoke the universe into existence! This is how the formula works. When you are facing the report of man that says your medical condition is beyond hope whose report will you believe? Believing in the report of the experts of man will lead you into despair and hopelessness. But as you trust in God He will fill you with His joy from knowing who your healer is and peace from having your expectations centered on Almighty God who knows you a bit more personally than your doctor:
For you created my inmost being; you knit me together in my mother's womb. Psalm 139: 13
No matter how dire the situation trust God! The more you trust Him the more His joy and peace fill your life; eliminating the anxieties and miseries of the world. Continuing in the key verse we see the result of being filled with joy and peace is so we can overflow with hope! Remember, hope was defined as someone (or thing) we center our expectations in. When the world defines what our hope is in, we are never at peace; never fully in joy. We cannot be because the things of this world are transitory by nature they are passing on. They are temporal and temporary.
For our light and momentary troubles are achieving for us an eternal glory that far outweighs them all. So we fix our eyes not on what is seen, but on what is unseen. For what is seen is temporary, but what is unseen is eternal. 2Corinthians 4: 17-18
Look how the Bible defines the very things which we worry so much over "light and momentary." These problems are actually achieving for us an eternal glory. How? By the formula found in the key verse! The more we trust Him in the midst of our trials, the more he fills us with His joy and peace, which results in an overflowing hope. As our hope is in Him the eternal pushes out the temporal.
The key verse ends with the secret to the formula the power of the Holy Spirit. Let's be real. It is not easy to ignore the world. It is not easy to avoid the distractions of the enemy. It is difficult to defer to faith instead of what we can see. The Bible may say that we walk by faith not by sight but when what we believe in the pages of the Bible demand a physical witness in our lives, we can waver. We can believe the report of the doctor. We can despair in the unemployment. The victorious Christian life is not about denying feelings but about making them obedient to Christ.
Let's look at Peter. After being specifically told by Jesus that he would deny Him three times that very night, one would think that Peter would be wary on the lookout vigilant. Instead, the chaos of the arrest of Jesus dispersed the Apostles and Peter found himself trying to find out what was happening to Jesus:
While Peter was below in the courtyard, one of the servant girls of the high priest came by. When she saw Peter warming himself, she looked closely at him. "You also were with that Nazarene, Jesus," she said. But he denied it. "I don't know or understand what you're talking about," he said, and went out into the entryway. When the servant girl saw him there, she said again to those standing around, "This fellow is one of them." Again he denied it. After a little while, those standing near said to Peter, "Surely you are one of them, for you are a Galilean." He began to call down curses on himself, and he swore to them, "I don't know this man you're talking about." Mark 14: 66-71