I'd say that after my father passed my writing changed it went deeper. Most would say 'matured' but I don't think I'd use that word in relation to my progress. I think 'change' is a little more accurate.
Obama has no power to change American policy because there are people who specialize in drawing these policies which have been and still are hostile towards Islam.
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No passion in the world is equal to the passion to alter someone else's draft.