When the proposition has been proved in this manner, and when two parts of the ratiocination have proceeded, they say in the third part, that it is desirable to assume, from the mere intrinsic force of the proposition, what you wish to prove; in this way:--"But none of all those things is managed better than the entire world." In the fourth division they adduce besides another argument in proof of this assumption, in this manner:--"For both the rising and setting of the stars preserve some definite order, and their annual commutations do not only always take place in the same manner by some express necessity, but they are also adapted to the service of everything, and their daily and nightly changes have never injured anything in any particular from being altered capriciously." And all these things are a token that the nature of the world has been arranged by no ordinary wisdom. In the fifth division they bring forward that sort of statement, which either adduces that sort of fact alone which is compelled in every possible manner, in this way:--"The world, therefore, is governed on some settled plan;" or else, when it has briefly united both the proposition and the assumption, it adds this which is derived from both of them together, in this way:--"But if those things are managed better which are conducted on a settled plan, than those which are conducted without such settled plan; and if nothing whatever is managed better than the entire world; therefore it follows that the world is managed on a settled plan." And in this way they think that such argumentation has five divisions. XXXV. But those who affirm that it has only three divisions, do not think that the argumentation ought to be conducted in any other way, but they find fault with this arrangement of the divisions. For they say that neither the proposition nor the assumption ought to be separated from their proofs; and that a proposition does not appear to be complete, nor an assumption perfect, which is not corroborated by proof. Therefore, they say that what those other men divide into two parts, proposition and proof, appears to them one part only, namely proposition. For if it be not proved, the proposition has no business to make part of the argumentation. In the same way they say that that which those other men call the assumption, and the proof of the assumption, appears to them to be assumption only. And the result is, that the whole argumentation being treated in the same way, appears to some susceptible of five divisions, and to others of only three; so that the difference does not so much affect the practice of speaking, as the principles on which the rules are to be laid down.