From the Archbishop of Canterbury's 2011 Easter Sermon,
"Christian joy, the joy of Easter, is offered to the world not to guarantee a permanently happy society in the sense of a society free from tension, pain or disappointment, but to affirm that whatever happens in the unpredictable world – sometimes wonderfully, sometimes horribly unpredictable – there is a deeper level of reality, a world within the world, where love and reconciliation are ceaselessly at work, a world with which contact can be made so that we are able to live honestly and courageously with the challenges constantly thrown at us. And on the first Easter morning, it is as if ‘the fountains of the great deep’ are broken open, and we are allowed to see, like Peter and John at the empty tomb, into the darkness for a moment – and find our world turned upside down, joy made possible."
(I might like to see his "can be made" changed to "has been made")
When I experience people radiating with that joy from God even during their times of challenge and pain, I think I see the world turned upside down too.
Sometimes the world is turned upside down when other improbable events occur, such as my agreement with the AoC.