bah.. the crucible and that dawe poem
you need to structure your essay so that as well as talking about the maniuplation/embodiment/practise of power, you examine the various techniques used in the text to convey that.
eg. 1984 - the ultimate power of deprivation = thru bleak imagery of dystopian society ("gritty swirls of dust")
power over thought- the paradox "doublethink"
power over relationships - metaphor of the parsons children
winston's individual power; metaphor of 'golden country'...
plus all that religious resonance...
you need the language support tho