Can't remember the exact words-- but in the words of the old hymn--

God is working his purpose out
As year succeeds to year
God is working his purpose out
And the time is coming near---

After a lot of verses it ends with the prophetic words that--

God is working his purpose out
Til the waters cover the sea....

All that 'working out' takes time and it's bound to take us even longer than god. And god HAS got eternity I guess.