Complex sentence: However, both of these works focused on the religious experiences of their authors; the "Confessions" was one of the first autobiographies in which an individual wrote of his own life mainly in terms of his worldly experiences and personal feelings.
Split into simpler sentences: However, both of these works focused on the religious experiences of their authors. The "Confessions" was one of the first autobiographies in which an individual wrote of his own life mainly in terms of his worldly experiences and personal feelings.