Isaiah 40:29 He gives strength to the weary and increases the power of the weak. 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, and they will walk and not be faint.
Even the strongest people get tired at times, but God’s power and strength never diminish. He is never too tired or too busy to help and listen. His strength is our source of strength. When you feel all of life crushing you and cannot go another step, remember that you can call upon God to renew your strength.
Under Gods command 