Isaiah 40:30, 31

Even youths grow tired and weary, and young men stumble and fall; but those who hope in the Lord will renew their strength. They will soar on wings like eagles; they will run and not grow weary, they will walk and not be faint ~ Isaiah 40:30, 31

I watch little children in my family run around, it seems with boundless energy. They jump, and run, and dance, and preen around, never seeming to stop. Until of course, it is nap time. Then their little bodies begin to crash in exhaustion. This is the comparison Isaiah is making between youth and God. Young children who seem vigorous, or young men who seem extra strong in their manliness, or young women who train hard in physical fitness become weary and their powers are suddenly exhausted. The most fit human being will be worn down by fatigue or paralyzed by sickness or death. In stark contrast, the powers of God never grow weary, and those who trust in him should never become faint. The prophet next compares that man or woman who trust in God to that of an eagle. It has long been thought the eagle lives and keeps his vigor to an old age, much beyond that of other bird varieties. The eagle may still molt in his old age, but he also will still renew his feathers, and with them, his youth is also renewed. There are many circumstances of life which wear us down: dissention, grief, stress of poverty, family troubles, life in general can wear us down. No one is problem free, or pain free always. But with Christ at our side, we will soar like an eagle, we will defeat the enemy of our soul, we will conquer the unconquerable of life. It does not mean it suddenly won’t be a challenge – it will remain so. But those who will wait upon the Lord for His help, who place their trust in Him, will find their salvation and be renewed to meet the trials of life.