What is a constitution?  Certainly not a league, compact, or confederacy, but a fundamental law.  That fundamental regulation which determines the manner in which the public authority is to be executed, is what forms the constitution of a state.  Those primary rules which concern the body itself, and the very being of the political society, the form of government, and the manner in which power is to be exercised—­all, in a word, which form together the constitution of a state—­these are the fundamental laws.  This, Sir, is the language of the public writers.  But do we need to be informed, in this country, what a constitution is?  Is it not an idea perfectly familiar, definite, and well settled?  We are at no loss to understand what is meant by the constitution of one of the States; and the Constitution of the United States speaks of itself as being an instrument of the same nature.

    DANIEL WEBSTER:  The Constitution Not a Compact
    between Sovereign States, 1833

Particulars of a General Statement.  A general statement made at the beginning of a paragraph or section, serving as the topic sentence, may then be explained by breaking the general idea up into details and particulars.  This may partake of the nature of both definition and partition, as the terms may be explained and their component parts listed.  Note that in the following selection the first sentences state the topic of the passage which the succeeding sentences explain by discussing the phrase variety of evils.

So likewise a passionate attachment of one nation for another produces a variety of evils.  Sympathy for the favorite nation, facilitating the illusion of an imaginary common interest, in cases where no real common interest exists, and infusing into one the enmities of the other, betrays the former into a participation in the quarrels and wars of the latter, without adequate inducement or justification.  It leads also to concessions to the favorite nation of privileges denied to others, which is apt doubly to injure the nation making the concessions; by unnecessarily parting with what ought to have been retained, and by exciting jealousy, ill-will, and a disposition to retaliate, in the parties from whom equal privileges are withheld, and it gives to ambitious, corrupted, or deluded citizens (who devote themselves to the favorite nation), facility to betray, or sacrifice the interests of their own country, without odium, sometimes even with popularity; gilding with the appearances of a virtuous sense of obligation, a commendable deference for public opinion, or a laudable zeal for public good, the base or foolish compliances of ambition, corruption or infatuation.

    GEORGE WASHINGTON:  Farewell Address, 1796

Examples.  A statement may be explained by giving examples.  The speaker must be sure that his example fits the case exactly; that it is typical—­that is, it must serve as a true instance of all cases under the statement, not be merely an exception; that it is perfectly clear; that it impresses the audience as unanswerable.  The example may be either actual or suppositious, but it must illustrate clearly and accurately.  The use of examples is a great aid in explanation.  John C. Calhoun expressed the value very distinctly in one of his speeches.