Scripture basis: Isaiah 40:27-31
“Wake up. Take a look at the majesty and power of God. Who dares to think that anything can be hidden from God? “Have you not heard, do you not know that the Everlasting God, the Lord, the creator of the ends of the earth is never weary, nor depressed, nor is there any way of equaling His understanding. "God sometimes chooses to grant strength to the weak. It is also noticeable that even the young people with their vigor and freshness become tired and lose their force, but the people, young and old, who serve God, have an inner strength from the Lord, and they shall continually be refreshed by the Lord. They shall often have their spirits soar as if borne on the wings of an eagle. They shall run and not notice their weariness, and they shall walk and feel no faintness.”
Paraphrase from The Word Made Fresh