A postil or postilla (in German: Postille) was originally a term for Bible commentaries.

In the liner notes, he discusses his late father, Sam Postil, and the admiration for law enforcement officers that Sam instilled in Mike.

The term postil fell into disuse during the period of Pietism and the Enlightenment, but was revived by Claus Harms (Winter-Postille, Kiel, 1812; Sommer-Postille, 1815).

He sponsored Mikalojus Daukša, who published a catechism (1595) and a postil (1599) in the Lithuanian language-the first Lithuanian books printed within the Grand Duchy of Lithuania.

Postilė (Full title: Postilla, tatai esti trumpas ir prastas ischguldimas euangeliu) is a 1000-page postil (collection of sermons and Bible commentaries) written in the Lithuanian language by Jonas Bretkūnas in 1591.

Gradually, since time in Oulu, Hedberg discovered Lutheranism without any "order of salvation" from Martin Luther's postil and abandoned Pietism including books of Arndt and Spener among others, which had formerly been his spiritual authorities.

From the time of Martin Luther, who published the first part of his postil under the title Enarrationes epistolarum et evangeliorum quas postillas vocant (Wittenberg, 1521), every annual cycle of sermons on the lessons, whether consisting of homilies or formal sermons, is termed a postil.