Dayenu

One of the most enjoyable parts of the Passover ceremony is the singing, invariably full-throated in my experience, of all 15 verses of “Dayenu”: ... 
… Enough already!
The Dayenu is a series of self-generating conditional clauses, composed, if you like, in that most kop-dreying of all tenses, the Judaeo-hypothetic-preconditional, in which problems are imagined in advance of their occurring, imagined, indeed, in spite of their having been averted, and there is no fathoming the sequence of causation: Do our travails precede our giving thanks, or does our giving thanks occasion our travails? In one sense, our gratitude is forever playing catch-up with His infinite magnanimity; but in another—driven on by the rhythmic expectations of those clauses—it is we who are pushing Him to go on showering us with more favors. ...
Howard Jacobson. Che poi va avanti legando il dayenu con la visione del mondo - e l'umorismo - ebraici. Bello. Buon Pesach. tablet.