He gives strength to the weary and increases the power of the weak.

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.