Benevolessence is the crystallized, physical form of mankind's gratitude. By helping and protecting Angel Falls and earning the thanks of its people, one of the Hero's first goals is to obtain enough Benevolessence for the World Tree Yggdrasil to produce the golden fruit known as Fyggs.
Even after falling from the Observatory and losing the ability to see Benevolessence in its physical form, the Hero still gathers the crystals. It was the Hero's ability to aid and protect the humans (alive and dead alike) that finally convinced his/her companion, Stella, that he/she is a fallen Celestrian. After which, Stella agrees to help the main character return to the Observatory by way of the Starflight Express.