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These words are repeated (with a slight change) from the parenthetical clause in verse 4. to emphasize the assertion as a substantive proposition, that fighting and visible forces in the physical world are not the only forces with which Allah works out His Plan. The invisible forces are more important as they were at Hudaibiya. The slight difference is instructive; in the parenthetical clause, Allah's Knowledge was emphasized, and in the substantive clause it is Allah's Power. Knowledge plans, and Power executes.