Thus both Abelard and Peter Lombard, in the interest of the immutability of the divine :substance (holding that God could not "become" anything), gravitated towards a Nestorian position.
His cosmology was an assertion not so much of the immutability of the One as rather of the mutability of the Many.
These confessions teach the root idea of Calvin's theology, the immeasurable awfulness of God, His eternity, and the immutability of His decrees.
The Stoics were not quite agreed as to the immutability of virtue, but they were agreed that, when once possessed, it could only be lost through the loss of reason itself.
His most important works are: Aesthetik (Leipzig, 1859; 3rd ed., 1885), supplemented by Die Kunst im Zusammenhang der Kulturentwicklung and der Ideale der Menschheit (3rd ed., 1877-1886); Die philosophische Weltanschauung der Reformationszeit (Stuttgart, 1847; 2nd ed., Leipzig, 1886), and Die sittliche Weltordnung (Leipzig, 1877; 2nd ed., 1891), in which he recognized both the immutability of the laws of nature and the freedom of the will.