This 3-volume collection focuses on essential doctrines of Christianity, focusing on theology and application. Hastings wrote about three important doctrines of Christianity: Prayer, Faith, and Peace. Hastings believed spiritual growth revolved around an understanding of these three areas. These works are encouraging and practical for pastors, students, and those wishing to enrich their spiritual lives and practical understanding of these Christian doctrines.
Due to Hastings study in classical literature his writings tend to be more literary in nature. He uses this to his advantage here in avoiding a dry presentation of doctrine by presenting great truths using an approachable tone and examples.