God foretold through Isaiah that after His people returned to their homeland, they would not have to struggle against harsh, dangerous elements; nor would they need to fear attacks from animals or beastlike men. Young and old would be safe. (Isa. 11:6-9; 35:5-10; 51:3) Isaiah also said that the whole earth​—not just the nation of Israel—​would “be filled with the knowledge of Jehovah as the waters cover the sea.” Isaiah further emphasized that the returnees would not be threatened by animals or humans. Their land would produce abundant fruit, made possible by an ample supply of water, even as the garden of Eden was well-watered. (Gen. 2:10-14; Jer. 31:12) Would that be the only fulfillment? There is no evidence that those returning from exile were miraculously cured. For example, the blind did not regain their sight. So God was indicating that literal healings would yet occur. w18.12 5 ¶11-12