As for our saying whether there are two causes in the mind for the matter to have an effect, it is not correct for the rational effect to have two causes. Rather, if it has an effect, then it is due to one cause, because there is no benefit for the cause unless it has an effect on the effect. However, if it is agreed that one of the conditions for the effect is that it has a characteristic in it. It is accepted to be an effect of this cause, and it is not possible for this to be a cause of that effect itself, unless that effect has that psychological characteristic, for which it is necessary. This does not necessitate that that psychological characteristic be its cause, for it is a psychological characteristic, and a thing cannot be a cause for itself, for it leads to That the cause be the same as the effect, so that the thing is prior to itself in rank, and this is impossible, so for the thing to be the cause of itself is impossible, for if the world did not have in itself a qual