If you’re unfamiliar with the ideas of St. Gregory of Nyssa regarding the believer’s unending progression into God, Fr Aidan discusses it in Meditating on Moses: The Infinity of Virute. It’s a wonderful thought—our perfection is a never-ending adventure into God. Heaven may be a resting place from the particular struggles and temptations of the present and from our proclivity to weakness and failure. But with respect to our perfection—i.e., the fulfillment of our natures—heaven is anything but the end of the road. It is an infinitely extended beginning of sorts, an unending adventure in God of his own infinite beauties, the perfect union into one final experienced rest both of being presently satiated and hungry for more. But this hunger for more is not deferment of the good. It express no failure of God to satisfy. Rather, it is the satisfaction of an expanding desire for God. Think of opening a present to find that the gift inside in addition to being more than you could imagine also contains its own gift which contains yet another and so on ad infinitum.
I won’t park here on the implications this has for apatheia as we’ve tried to express it here and why those who deny it are left with a view of their own eternal rest in God as the static repetition of the finite. In the end you reap what you sow.