All that has happened has only been the cover and the title page

“And as He spoke, He no longer looked to them like a lion…And for us this is the end…But for them it was only the beginning of the real story. All their life in this world and all their adventures in Narnia had only been the cover and the title page: now at last they were beginning Chapter One of the Great Story which no one on earth has read: which goes on forever: in which every chapter is better than the one before.” — in Farewell to Shadowlands, The Last Battle, The Chronicles of Narnia by C. S. Lewis