45. But they, too, who would forbid the city to strangers cannot have our approval. They would expel them at the very time when they ought to help, and separate them from the trade of their common parent. They would refuse them a share in the produce meant for all, and avert the intercourse that has already begun; and they are unwilling, in a time of necessity, to give those with whom they have enjoyed their rights in common, a share in what they themselves have. Beasts do not drive out beasts, yet man shuts out man. Wild beasts and animals consider food which the earth supplies to be common to all. They all give assistance to those like themselves; and man, who ought to think nothing human foreign to himself, fights against his own.