Eduardo Chillida asked the French philosopher Gaston Bachelard to write the text for the catalogue that accompanied his first solo exhibition in the Maeght Gallery, which he would title El cosmos del hierro (Cosmos of Iron). The thinker knew how to use words to capture Chillida's universe and his imprisonment in the creative forge, as well as the aesthetic revolution that took place in the iron pieces created in his early years. His concern for space became evident during that time. Sueño articulado, Homenaje a Gaston Bachelard is a proof of this dialogue with what is apparently invisible. The iron blocks spread throughout the space create tension and initiate an active dialogue with the void. Chillida's sculptural work thus took on a new direction. The sculptor invites the observer to intuit what happens in the void, to read between the forms and to sense in the invisible.