The lyrics of There is a Fountain Filled With Blood, written by William Cowper, and a history of how the song came into being. Link here.
A blog post can only introduce a topic, but not cover it in depth. For more study on various topics, click here for links to Christian bookstores and other Christian sites.
The link above will take you to links to sites that teach on faith, prayer, confession, healing and more. They have church services, podcasts, bookstores, and further resources and teaching.