When he says “having no hope, without God in the world,” he does not deny that the Ephesians had many gods before they believed in Christ. His point is that one who is without the true God has no god worthy of the name. And the next phrase, “without God in the world,” is significant: The Gentiles in a sense already had God indeed in the form of anticipation, because God knew beforehand that he would have them. In God’s foreknowledge they were never without God. But enmeshed in the world they were without God. .
Them to remember, that at the time when they were Gentiles they were without Christ, aliens from (the commonwealth of) Israel, without intercourse, without the covenants and any hope of promise, nay, without God, even in his own world.
Who is now in some sense an "alien "and "stranger."