Have you never heard? Have you never understood? The Lord is the everlasting God, the Creator of all the earth. He never grows weak or weary. No one can measure the depths of his understanding.
But those who trust in the Lord will find new strength. They will soar high on wings like eagles. They will run and not grow weary. They will walk and not faint.
So you have not received a spirit that makes you fearful slaves. Instead, you received God’s Spirit when he adopted you as his own children. Now we call him, “Abba, Father.”