William Safire’s 12 rules on how to read a newspaper column, Rule number 5:
Don’t fall for the “snapper” device. To give an aimless harangue the illusion of shapeliness, some of us begin (forget “lede”) with a historical allusion or revealing anecdote, then wander around for 600 words before concluding by harking back to an event or quotation in the opening graph. This stylistic circularity gives the reader a snappy sense of completion when the pundit has not figured out his argument’s conclusion.
Funny, I use that all the time. (via)