Who does Genji see when he visits the sage in the mountain? What is his reaction?

Genji goes to the mountains to visit a sage to cure himself of his illness. While there he catches sight of a young 10 year old girl, Murasaki. Genji believes that the girl is beautiful, and even though she is still very young, Genji dreams of someday making her his wife. Given his affections, Genji is determined to take care of Murasaki.