Although most of the Roman deities were abstractions in the sense just indicated, many others and very important ones bore personal names. These names could not help suggesting to intelligent men at all times that the god who bore one of them was himself a person, that his manifestations would be in human form, and that his mental make-up was like their own. Genetic relations between themselves and the gods so conceived were rapidly enough established. It is very likely, too, that some of these deities, perhaps Jupiter himself, were brought into Italy by kinsmen of those who brought Zeus into Greece, although the kinship must have been extremely remote. And when the gods are persons, stories about them are inevitable, arising partly as folk-lore and partly from individual poetic imagining. There are accordingly traces of an indigenous Roman or Italic mythology, but that mythology was literally overwhelmed, in relatively early times, by the artistically more developed one of the Greeks, so that its very existence has been questioned.[38] The openness of the Romans to foreign religious influences is an outcome of a conception, common enough, but more pronounced among the Romans than anywhere else. In most places the gods were believed to be locally limited in their sphere of action, and in most places this limitation was not due to unchangeable necessity but to the choice of residence on the part of the deity. Since it was a choice, it was subject to revocation. The actual land, once endeared to god or man, had a powerful hold upon his affections, vastly more powerful than the corresponding feeling of to-day, but for either god or man changes might and did occur.