L'adultère introduit l'esprit dans la lettre que bien souvent le mariage eût laissée morte. - Marcel Proust

Like everyone who possesses something precious in order to know what would happen if he ceased for a moment to possess it, he had detached the precious object from his mind, leaving, as he thought, everything else in the same state as when it was there. But the absence of one part from a whole is not only that, it is not simply a partial lack, it is a derangement of all the other parts, a new state which it was impossible to foresee in the old.

For what we suppose to be our love or our jealousy is never a single, continuous and indivisible passion. It is composed of an infinity of successive loves, of different jealousies, each of which is ephemeral, although by their uninterrupted multiplicity they give us the impression of continuity, the illusion of unity.

Adultery breathes new life into marriages which have been left for dead.