In every science conceptions which relate to method are inseparable from those which relate to the doctrine under consideration. The method has to be so varied in its application, and so largely modified by the complexity and special nature of the phenomena, in each case, that any general notions of method would be too indefinite for actual use. If, therefore, we have not separated the method from the doctrine in the simpler departments of science, much less should we think of doing so when treating of the complex phenomena of social life, to say nothing of the great feature of this last case,—its want of positivity. In the formation of a new science the general spirit of it must be seized before its particular parts can be investigated: that is, we must have some notion of the doctrine before examining the method, and then the method cannot be estimated in any other way than by its use. Thus, I have not to offer a logical exposition of method in social physics before proceeding to the science itself; but I must follow the same plan here as in the case of the anterior sciences,—ascertaining its general spirit, and what are the collective resources proper to it. Though these subjects may be said to belong to the science itself, we may consider them as belonging to the method, as they are absolutely necessary to direct our understandings in the pursuit of this difficult study.