From Long Way to a Small, Angry Planet by Becky Chambers (pp.150-151)

Even so, Ohan was afraid. They could disconnect themself from the fear, but it lingered, like an unpleasant taste in the back of the throat. Fear. Such a throwback emotion, meant to spur primitive life-forms away from potential predators. Life’s universal constant. Every fear of rejection, of criticism, or failure, of loss– these were all caused by that same archaic survival reflex.