Plato said this quote

“ I shall try to persuade first the Rulers and soldiers, and then the rest of the community, that the upbringing and education we have given them was all something that happened to them only in a dream. In reality they were fashioned and reared, and their arms and equipment manufactured, in the depths of the earth, and Earth herself, their mother, brought them up, when they were complete, into the light of day; so now they must think of the land in which they live as their mother and protect her if she is attacked, while their fellow citizens they must regard as brothers born of the same mother earth…. That is the story. Do you know of any way of making them believe it?” “Not in the first generation,” he said, “but you might succeed with the second, and later generations. ”