Immanuel Kant
Kant was born on April 22, 1724 into a Prussian German family of Lutheran Protestant faith in Königsberg, East Prussia. Baptized 'Emanuel', he later changed his name to 'Immanuel' after learning Hebrew. He was brought up in a Pietist household that stressed religious devotion, humility, and a literal interpretation of the Bible. His education was strict, punitive and disciplinary, and focused on Latin and religious instruction over mathematics and science. Kant maintained Christian ideals for some time, but struggled to reconcile the faith with his belief in science. In his "Groundwork of the Metaphysic of Morals", he reveals a belief in immortality as the necessary condition of humanity's approach to the highest morality possible. However, as Kant was skeptical about some of the arguments used prior to him in defence of theism and maintained that human understanding is limited and can never attain knowledge about God or the soul, various commentators have labelled him a philosophical agnostic.
Johann Friedrich Herbart
Herbart was born on 4 May 1776 in Oldenburg. Growing up as a fragile child because of an unfortunate accident, Herbart was taught by his mother at home until the age of 12. He continued his schooling at the "Gymnasium" for six years, and showed interest in philosophy, logic and Kant's work involving the nature of knowledge obtained from experience with reality. His education then continued at Jena, whereupon he studied philosophy and came to disagree with his teacher Fichte precisely because Fichte had taught him to think in a logical manner. He composed a few essays, which he had given to Fichte during his years at Jena, criticising the works of Schelling and advocating his contention for the German idealism promoted by others like Kant at the time.