The Partially Examined Life (Citizens): (Protected Content)
On Faith and Knowledge (1802), Ch. 1 and 2. Famously, Kant critiqued Reason to effectively forbid theology and metaphysics, and a young G.W.F. Hegel was not happy about that. He argues against the reduction of Reason to merely applying to the realm of experience, which makes religion merely a subjective, insubstantial matter. Hegel thought he could do better.