Passion was an emotion characterized by intense enthusiasm towards or compelling desire for someone or something.
As Captain Christopher Pike came to realize in his captivity, the Talosians were not doing the illusions just for passion. They were after respect and mutual dependence. (TOS: "The Cage")
In 2378, the Photons Be Free holographic character Three of Eight stated that the protagonist Emergency Medical Hologram and others like them would one day be recognized as intelligent individuals with a passion for life. (VOY: "Author, Author")