These last poems were published in 1954, three years after his death, and suggest that the attitude of his previous two collections was only a passing phase. There is a return to the optimism that characterises most of his work. He reasserts his belief in the most enduring factors of life, not tied to any particular set of historical circumstances and therefore able to outlast them. The final poem is the one that was used to provide a title for the collection. It consists of a string of adverbial subjunctive clauses with the main subject continually suppressed – the implication being that it is poetry itself that will survive as long as certain things continue to happen or exist.