Ideo in presenti sermone gratia Dei de oratione tria declaremus salutis documenta, scilicet: 1) Primum de orationis quiditate; 2) Secundum de orationis modalitate; 3) Secundum de orationis commendabilitate.

So in this sermon about prayer we can illustrate, with God's grace, three useful teachings: 1) The first, concerning the essence of prayer; 2) Secondly, concerning the modality of prayer; 3) Thirdly, concerning the commendability of prayer.

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This sermon is part of a group (sermons 13-16, from Monday after Reminiscere to Thursday after Reminiscere) developing the topic of the third commandment.