According to Cercidas of Megalopolis (3rd B. C.), « The gods left a long time ago ». Therefore our history began with (or even after) their departure ; maybe when we stopped knowing that they were present. They cannot come back in our history, and « coming back » has no meaning outside of it. But when our history is unresolved, when it is no longer a history – a process –, but an opening, then something can happen.