Hicks and Martela in Scientific American:
Many scholars agree that a subjectively meaningful existence often boils down to three factors: the feeling that one’s life is coherent and “makes sense,” the possession of clear and satisfying long-term goals and the belief that one’s life matters in the grand scheme of things. Psychologists call these three things coherence, purpose and existential mattering.
But we believe there is another element to consider. Think about the first butterfly you stop to admire after a long winter or imagine the scenery atop a hill after a fresh hike. Sometimes existence delivers us small moments of beauty. When people are open to appreciating such experiences, these moments may enhance how they view their life. We call this element experiential appreciation. The phenomenon reflects the feeling of a deep connection to events as they transpire and the ability to extract value from that link. It represents the detection of and admiration for life’s inherent beauty.