Ein Beitrag zur Geschichte der Aufklarung (Berlin, 1888); and E.
Works: - Neue Apologie des Socrates, &c. (2 vols., 1772-1778); Allgemeine Theorie des Denkens and Empfindens, &c. (Berlin, 1776), an essay which gained the prize assigned by the Royal Society of Berlin for that year; Von dem Begriff der Philosophie and ihren Theilen (Berlin, 1778) - a short essay, in which he announced the plan of his lectures on being appointed to the professorship at Halle; Lobschrift auf Herrn Johann Thunmann Prof. der Weltweisheit and Beredsamkeit auf der Universitcit zu Halle (Halle, 1779); Amyntor, eine Geschichte in Briefen (Berlin, 1782) - written with the view of counteracting the influence of those sceptical and Epicurean principles in religion and morals then so prevalent in France, and rapidly spreading amongst the higher ranks in Germany; Ober die Zeichen der Aufklarung einer Nation, &c. (Halle, 1783); Theorie der schonen Kiinste and Wissenschaften, &c. (Halle, 1783, 3rd ed.
This rationalism within the Church was a theological manifestation of the intellectual movement known as the Enlightenment (Aufklarung), and must be studied in close connexion with the purely philosophical rationalism already discussed.
The Aufklarung, with its rational theology, was to him the type of abstraction.
It deserves to be noted here that the former, the theology of the Aufklarung, was, like that of the deists, destined to a short-lived notoriety; whereas the solid, accurate and scholarly researches of the rationalist critics of Germany, undertaken with no merely polemical spirit, not only form an epoch in the history of theology, but have taken a permanent place in the body of theological science.
As a distinct movement Pietism had run its course before the middle of the 18th century; by its very individualism it had helped to prepare the way for another great movement, the Illumination (Aufklarung), which was now to lead the world into new paths.
Henceforward he took a deep interest in modern history and politics, as well as in theology, and published Geschichte der Politik, Kultur and Aufklarung des 18ten Jahrhunderts (4 vols.