In their 50th episode of Deep in History, Marcus Grodi and Msgr. Jeffrey Steenson conclude their discussion of the important early work "Against Heresies" by St. Irenaeus of Lyons.

Irenaeus covers a lot of ground in the close of his book: from the authority of the Church, to the necessity of guarding the deposit of faith, to death, judgment, heaven and hell. And as Msgr. Steenson points out, some scholars wonder if the abruptness of its ending is an indication that St. Ireneaus left the book unfinished.

And we're not quite done with St. Irenaeus! In the next episode, Marcus and Msgr. Steenson look at some other aspects of the life and writing of St. Irenaeus, who could soon be declared a Doctor of the Church.

For more episodes, visit deepinhistory.com.