 Beyond topics typically covered by canon law collections, "Hib" touches on prayer, consecrated places, martyrs, the ‘substances of men’, blessings, and the soul; indeed, certain chapters often verge on essays on morality.Maurice P. Sheehy said of "Hib", ‘as a single document, [it] is probably the most ambitious endeavour to codify Christian life of all the medieval canonical compilations.’ A relatively small portion of the work comprises excerpts from ancient canons and decretals; far more common are citations of Scripture and the Church Fathers―Origen, Jerome, Augustine, Pope Gregory I, and Gregory Nazianzenus being most prominent among these.Its use of Greek Fathers as sources for canon law has been called ‘unique’.