A prolific writer, professor, and pastor, Johann Gerhard (1582–1637) is regarded as one of the greatest theologians and thinkers of his time. Meditations on Divine Mercy is a collection of prayers written by Johann Gerhard. In addition to Gerhard’s prayers, the book also includes a chapter on the purpose and benefits of prayer, as well as an explanation of the blessing and historic aspects of daily meditation.

Many classic Lutheran books of theology have similar titles. What do these similar names mean and where did they come from?