Final answer:
The juxtaposition of 'innocent and old world kindness' with 'a flame of anger' is an example of paradox, which involves seemingly contradictory elements in one situation.
Step-by-step explanation:
The phrase 'To breathe such an innocent and old world kindness' juxtaposed with 'Broke out in a flame of anger' represents an example of paradox.
A paradox involves a statement or situation containing apparently contradictory or incompatible elements.
In this case, the juxtaposition of 'innocent and old world kindness' with 'a flame of anger' creates a surprising contrast because the concepts of kindness and anger are typically seen as opposites.