Perhaps some one may ask: Why may not practical efficiency reside in the non-fluxional (or permanent)? If so, this is wrong, as obnoxious to the following dilemma. Has your "permanent" a power of past and future practical efficiency during its exertion of present practical efficiency or no? On the former alternative (if it has such power), it cannot evacuate such past and future efficiency, because we cannot deny that it has power, and because we infer the consequence, that which can at any time do anything does not fail to do that at that time, as, for instance, a complement of causes, and this entity is thus powerful. On the latter alternative (if the permanent has no such power of past and future agency), it will never do anything, because practical efficiency results from power only; what at any time does not do anything, that at that time is unable to do it, as, for instance, a piece of stone does not produce a germ; and this entity while exerting its present practical efficiency, does not exert its past and future practical efficiency. Such is the contradiction. You will perhaps rejoin: By assuming successive subsidiaries, there is competent to the permanent entity a successive exertion of past and future practical efficiency. If so, we would ask you to explain: Do the subsidiaries assist the entity or not? If they do not, they are not required; for if they do nothing, they can have nothing to do with the successive exertion. If they do assist the thing, is this assistance (or supplementation) other than the thing or not? If it is other than the thing, then this adscititious (assistance) is the cause, and the non-momentary entity is not the cause: for the effect will then follow, by concomitance and non-concomitance, the adventitious supplementation. Thus it has been said: "What have rain and shine to do with the soul? Their effect is on the skin of man; "If the soul were like the skin, it would be non-permanent; and if the skin were like the soul, there could be no effect produced upon it."