Aegidius Hunnius (1550-1603) was among the "Champions of Lutheran Orthodoxy" who served on the faculty of the University of Wittenberg and was one of the early signers of the Formula of Concord. During his service at Wittenberg, he was also superintendent, and oversaw the visitation of the churches of Saxony, coauthoring the Saxon Visitation Articles (1592).In this work, Hunnius contends with the theology of Samuel Huber (1547-1624), a former Calvinist who was called to the University of Wittenberg in 1592. After arriving in Wittenberg, Huber introduced his own novel terminology and theology which put him at odds with the Formula of Concord and his fellow professors. Huber made the situation worse by accusing his colleagues of Calvinism when they did not assent to his theological opinions.In this book, Hunnius refutes Huber's errors regarding the doctrine of justification; as Hunnius wrote in the dedication to this work, "we propose ... not only to wash away the charges he has made, but especially to refute his shameful errors concerning the eternal election and predestination to eternal life, not only of the children of God, but also of the children of the devil (that is, all the impenitent); similarly, his errors concerning the universal justification of all men-of unbelievers no less than believers; concerning also the regeneration of hypocrites in Baptism, which is said to be conferred on them in that very act of treachery and impiety."