If something ceased to be ET-simultaneous with God's life, that would entail an earlier and a later part simultaneous to God's life, and so temporal succession in God's life.

Of course, one wants to know how to make sense of the idea that passage is real only in time. Stump and Kretzmann (1981) gave a take on this while retracting Kretzmann's original commitment to (1)–(4). Suppose presentism. On the Stump-Kretzmann picture, each time t, when present, is “ET-simultaneous” with the life of an eternal being. So that life is ET-simultaneous with t. So all times, precisely in their presentness, are just ET-simultaneous with an eternal life. But in an eternal life, nothing passes. If it did, that life would have earlier and later parts: it would be temporal, not ete...