While Kant attacked previous metaphysics for the most part from the side of its content, Jacobi did it especially from the side of its method of demonstration and, with great clarity and profundity, he put his finger on precisely the point at issue, namely that such a method of demonstration is strictly bound to the cycle of rigid necessity of finite reality, and that freedom, that is, the concept and with it everything that truly exists, lies beyond it and is unattainable by it.