Having posted the last, I've just come across these thoughts from Dietrich Bonhoeffer, the German pastor imprisoned for opposing Hitler.

He wrote from prison to a friend that the Christian should live “unreservedly in life's duties, problems, successes and failures, experiences and perplexities. In so doing we throw ourselves completely into the arms of God, taking seriously, not our own sufferings, but those of God in the world - watching with Christ in Gethsemane.” And later, to the same friend: “It is only when one loves life and the world so much that without them everything would be gone, that one can believe in the resurrection and a new world.”

After his execution, in April 1945, a fellow prisoner wrote of him that he “always seemed to diffuse an atmosphere of happiness, of joy in every smallest event in life, and a deep gratitude for the mere fact that he was alive.”