[DESCRIPTION]: The function f(x) seems to be selective for words associated with spiritual, philosophical, and mindfulness concepts. Some examples of concepts it is selective for are Buddhism and Zen. Words related to these concepts, such as Buddha, Nirvana, meditation, enlightenment, compassion, and zen, receive higher output values close to 1, while words from other categories like animals, objects, or concrete items receive lower values close to 0. Interestingly, the function doesn't seem to be as selective for other religious or spiritual traditions like Christianity, Islam, or Hinduism, as their values are much lower in comparison.