Die fröhliche Wissenschaft
Nietzsche began to expand on the concept of "Machtgelüst" in "The Gay Science" (1882), where in a section titled "On the doctrine of the feeling of power", he connects the desire for cruelty with the pleasure in the feeling of power. Elsewhere in "The Gay Science" he notes that it is only "in intellectual beings that pleasure, displeasure, and will are to be found", excluding the vast majority of organisms from the desire for power.