Thus is the hammer impelled toward the stone… Among the conditions for a Dionysian task are, in a decisive way, the hardness of the hammer, the joy even in destroying. The imperative, ‘become hard!’
Nietzsche establishes the hammer as the defining symbol of Dionysian creative will — the force that carves the Übermensch from resistant matter, demanding hardness as the mark of the creator.
, On the Genealogy of Morals, 1887thesis