'In Poetry’s Knowing Ignorance, Joseph Acquisto borrows a definition of poetry from Phillipe Jaccottet: ‘that key that you must always keep on losing’. Attempting to know its subject, poetry reveals that there is always more to know. But the French poet’s metaphor, for Acquisto, does not mean ‘simple contingency’. It suggests ‘a complex play of certainty and doubt … that actively resists coming to a conclusion’. We might say that poetry expresses the friction in human experience between time and permanence.' (Introduction)