Jehovah knew that the inhabitants of Babylon would become afraid. Babylon would be attacked by the mighty armies of Medo-Persia. Jehovah would use this army to free his people from captivity to Babylon. (Isa. 41:2-4) When the Babylonians and people of other nations knew that their enemy was approaching, they tried to maintain their courage by saying to one another: “Be strong.” They also made more idol gods, hoping that these would protect them. (Isa. 41:5-7) Meanwhile, Jehovah calmed the hearts of the Jewish exiles by saying: “You, O Israel, [unlike your neighbors] are my servant . . . Do not be anxious, for I am your God.” (Isa. 41:8-10) Note that Jehovah said: “I am your God.” With those words, Jehovah reassured his loyal worshippers that he had not forgotten them and that they were still his people. He told them: “I will carry you . . . and rescue you.” Those reassuring words no doubt strengthened the Jewish exiles.​—Isa. 46:3, 4. w19.01 4 ¶8