But there is another sense of the word possible; the sense in which an event is objectively undetermined. An event is possible if there is nothing in the previous chain of causation to determine the thing's happening in one way rather than another. The result is then a matter of pure chance or of absolute free will. Now God may make a thing possible in this objective sense, and then it is possible for him also. If you ask, but is God then ignorant of the result? We say, this is not ignorance. For to assume that it is, and that everything should be determined like eclipses, and that God cannot create things _possible_, means to destroy the order of the world, of this world as well as the next. For why shall man engage in various occupations or pursue definite lines of conduct since his destiny is already fixed? The truth of the matter is that there are several orders of causes. Some are directly determined by God, and there is no way of evading them; others are entrusted to nature, and man is able to enjoy its benefits and avoid its injuries by proper management. A third class contains the things of chance, and one may guard against these also. So we are bidden in the Bible to make a parapet on the roofs of our houses to guard against the possibility of falling down. Finally there is the fourth class, those things which depend upon the free choice of the individual. Right and wrong conduct are matters of choice, else there would be no use in prophets, and no reward and punishment. When a person makes an effort to be good, his desire increases, and he obtains assistance from the angels. Since freedom is supported by reason, Scripture and tradition, the passages in the Bible which are in favor of it should be taken literally, and those against it should be interpreted figuratively. When the Bible says that God hardened Pharaoh's heart, it means simply that Pharaoh was allowed to proceed as he began. All the ancient sages of our nation were in favor of freedom.[244] If we compare the above discussion of the problem of freedom with that of Judah Halevi (above, p. 171), we see that Ibn Daud is more consistent, whatever we may think of his success in solving the insoluble problem. He frankly insists on the absolute freedom of the will and on the reality of the objectively contingent, not shrinking before the unavoidable conclusion that the events which are the results of such freedom or chance are no more known beforehand to God than they are to man. And he tries to avoid the criticism of attributing imperfection to God by insisting that not to be able to foretell the contingent is not ignorance, and hence not an imperfection. The reader may think what he pleases of this defence, but there seems to be a more serious difficulty in what this idea implies than in what it explicitly says.