Angels are sent on missions of mercy to the children of God. To Abraham, with promises of blessing; to the gates of Sodom, to rescue righteous Lot from its fiery doom; to Elijah, as he was about to perish from weariness and hunger in the desert; to Elisha, with chariots and horses of fire surrounding the little town where he was shut in by his foes; to Daniel, while seeking divine wisdom in the court of a heathen king, or abandoned to become the lions’ prey; to Peter, doomed to death in Herod's dungeon; to the prisoners at Philippi; to Paul and His companions in the night of tempest on the sea; to open the mind of Cornelius to receive the gospel; to dispatch Peter with the message of salvation to the Gentile stranger—thus holy angels have, in all ages, ministered to God's people. TA 10.3
Thus God's people, exposed to the deceptive power and unsleeping malice of the prince of darkness, and in conflict with all the forces of evil, are assured of the unceasing guardianship of heavenly angels. Nor is such assurance given without need. If God has granted to His children promise of grace and protection, it is because there are mighty agencies of evil to be met—agencies numerous, determined, and untiring, of whose malignity and power none can safely be ignorant or unheeding. TA 11.1