When you arrive to Angel Falls, a cutscene plays of Ivor and Hugo talking about the inscription on the guardian statue changing. As a Celestial, you can not directly talk to the people; you can only listen to their thoughts.
To the left is a stable where a man is sleeping instead of cleaning. Pick up the five horse manure. Afterwards he will wake up in panic but find the stable clean. Believing it to be the work of the Guardian, he will offer up a crystal of benevolessence.
Inside the church there is an old woman who lost her husband's ring. Go outside and talk to the dog by the shop. It will lead you to the ring. Return to the old woman to give her the ring. She will give you a benevolessence.
When you exit the church it be night time. Aquila will greet you in the center. He will tell you to not just help the living but also the wandering souls.
To the right is a wandering soul who doesn't realize he died until he talks to you. Tell him the truth to get another benevolessence. Aquila will talk to you and have you return to the Observatory.