Our Lord's Sermon on the Mount (originally De sermone Domini in monte) is a book written by the Christian saint Augustine of Hippo in 393.
[1][2] The book is a commentary on Jesus's speech known as the Sermon on the Mount, as presented in the Gospel of Matthew Chapters 5-7.
Augustine considered this speech "a perfect standard of the Christian life".
In the first volume he studies Chapter 5 and asks, "Is it humanely possible to put the Beatitudes into practice?"
The second volume studies Chapters 6 and 7, and offers a condensed theology of prayer.