Over emphatic negatives always suggest that what is being denied may be what is really being asserted.
Life, as the most ancient of all metaphors insists, is a journey; and the travel book, in its deceptive simulation of the journey's fits and starts, rehearses life's own fragmentation. More even than the novel, it embraces the contingency of things.
There's an enduring American compulsion to be on the side of the angels. Expediency alone has never been an adequate American reason for doing anything. When actions are judged, they go before the bar of God, where Mom and the Flag closely flank His presence.
One of the oddest features of western Christianized culture is its ready acceptance of the myth of the stable family and the happy marriage. We have been taught to accept the myth not as an heroic ideal, something good, brave, and nearly impossible to fulfil, but as the very fiber of normal life. Given most families and most marriages, the belief seems admirable but foolhardily.