The cross is depicted as a 'living tree', riven by lightning and distorted by age, but still having life within itself and bursting out with new life. The concept is St Pauls' - life through death - decay and suffering transformed into resurrection and joy. This is the doctrinal aspect. Artistically there is a basic complexity in the Cross theme constrasted with simple, open shapes which might be thought of as landscape - earth, cornfields, lakes (all rather happy); or again as a butterfly's wings. The flickers of white falling from the extremeties of the Cross pass down back into the earth and rise again in the centre mass of light.