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CAUSATION AND EVOLUTION.
The agency
native is not
ter with the agencies of other cases.
type and character as that of the other cases. The chief agent or the nominative case is quite independent of the functional activities of the Nomiof the other cases which hold but a subordi- of the same
type characnate position in relation to the principal agent in so far its acting of its own accord of is concerned. For, whatever is powerless to act of itself, must be dependant-like the ball in motion-on another for its activities. The ball has the power to roll on ; heat has the power to expand bodies : but the ball would not roll or of itself, unless it is set in motion ; nor heat will expand bodies, unless the two, heat and body, are bought in close relationship to each other. This is the reason why these are said to be dependant on the agency of something else which must be competent enough to set the ball in motion or to bring the two in such relation as will enable the heat to act on the body so as to expand it. But it may be contended that at times, when we say. 'The ball rolls' or 'heat expands bodies' we really ascribe in our speech independence and agency to them so much so that we have to parse the words 'ball' or 'heat' as
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