Faith is having convictions of things not seen.

Psalm 107:1-9.
1 Give thanks to the Lord, for he is good; his love endures forever. 2  Let the redeemed of the Lord tell their story— those he redeemed from the hand of the foe, 3  those he gathered from the lands, from east and west, from north and south. 4  Some wandered in desert wastelands, finding no way to a city where they could settle. 5  They were hungry and thirsty, and their lives ebbed away. 6  Then they cried out to the Lord in their trouble, and he delivered them from their distress. 7  He led them by a straight way to a city where they could settle. 8  Let them give thanks to the Lord for his unfailing love and his wonderful deeds for mankind, 9  for he satisfies the thirsty and fills the hungry with good things.