What made David so determined to defeat Goliath? It was the same faith that motivated him to kill the lion and bear when they grabbed one of His sheep.
When he saw the Israelites about to be attacked by Goliath the giant he reacted with the heart of a shepherd. He knew the outcome before the battle.
Faith remembers what God has done in the past, and faith knows that God doesn't change.
God is still the same God Who stepped out from behind the curtain of nowhere onto the stage of nothing and spoke everything into existence, hanging the stars in their sockets and placing the planets in their orbits.
He still owns the cattle on a thousand hills. He is still the same God Who saved you by grace when you exercised that little mustard seed size grain of faith.
He is still the One Who met that need for you, touched that loved one and has never failed you to this point.
Our little problems and the Goliaths we face pose no problem to God.
Ephesians 3:20-21 Now unto him that is able to do exceeding abundantly above all that we ask or think, according to the power that worketh in us, Unto him be glory in the church by Christ Jesus throughout all ages, world without end. Amen.