The Wife's prologue is unique in that it is longer than the tale itself. The Wife of Bath uses the prologue to explain the basis of her theories about experience versus authority and to introduce the point that she illustrates in her tale: The thing women most desire is complete control ("sovereignty") over their husbands. Because she has had five husbands, the Wife feels that she can speak with authority from this experience, and, in the prologue, she tells how she got the upper hand with each of them.
In Chaucer's time, the antifeminism of the church was a strong controlling factor. Women were frequently characterized as almost monsters; they were sexually insatiable, lecherous, and shrewish, and they were patronized by the church authorities. Women were not allowed to participate in church doctrine in any way. Likewise, in Chaucer's time, a second marriage was considered suspect, so the Wife of Bath carefully reviews the words of God as revealed in scripture. And her knowledge of scripture (although confused at times) reveals that she is not simply an empty-minded woman. Nowhere, she confesses, can she find a stricture against more than one marriage, save the rebuke Jesus gave to the woman at the well about her five husbands. But this, she confesses, she cannot understand. Furthermore, in Chaucer's time, perpetual virginity received considerable praise; some of the saints were canonized because they preferred death to the loss of their virginity, or some struggled so fiercely to retain their virginity that they were considered martyrs and were canonized.
