our Father: God is described as a Father to his people. His care and faithfulness to his children are stronger and more secure than their family or national ancestry.
Their true identity does not depend only on being descendants of Abraham. It depends on belonging to God as his children (see Isaiah 9:6; 64:8; Deuteronomy 32:6; Psalm 68:5; Malachi 2:10; Matthew 6:9–15; Romans 8:15–17).