August Friedrich Wilhelm Sack

August Friedrich Wilhelm Sack (1703–1786) was one of the most eminent German Reformed preachers and a prominent liberal theologian of the reign of Frederick II of Prussia who helped shape the Enlightenment in Berlin and Prussia.

[1][2] August Friedrich Wilhelm Sack was born at Harzgerode in the Principality of Anhalt-Harzgerode on 4 February 1703, the eldest son of the mayor of the town.

[1] The main source for knowledge of his life is a biography together with some letters and other writings which were published by his son, Friedrich Samuel Gottfried Sack: Lebensbeschreibung nebst einigen von ihm hinterlassenen Briefen und Schriften (2 vols.

In this work, says John Powers Lacroix, the author ably and safely avoids the two fatal extremes of dynamic determinism as to the action of grace and of the self-regeneration of the Socinians.

One volume of them was translated into French by Frederick II's queen, Elizabeth: Six Sermons de M. Sack (1775).