No one can fail to feel the almost perplexing difference of this literature from the rest of the Old Testament; unlike the prophetic it has less a message to the conscience than a problem for the mind; unlike the historical books it is perfectly timeless, and utterly detached from the national hopes; it is not occupied with ceremonies or ritual, but with religion as a matter of conduct. The nearest approach to this is to be found in some of the Psalms, which, passing from the emotions of the devout spirit, become engaged with the problems and injustices of life. Its religion is more universal than that of the Prophets or even of the Psalmists, but it is less emotional; the religion of the heart has given way to the wisdom of the mind. We have here the beginnings of a philosophy, a mental activity strangely absent from the Hebrew race; it is not however a speculative philosophy, but one purely concerned with practical life; and yet there is a direct progression traceable from the chapters in Proverbs (i.-ix.), which are devoted to the praise of wisdom, through the work known as the Wisdom of Solomon, to Philo, the great Jewish philosopher, who endeavoured to interpret Moses by Plato and to reconcile Hebrew religion with Greek speculation. Although in this literature we have the beginnings of a philosophy it is rather that of the street than of the academy; a cultivation of a philosophic attitude towards life, its problems and duties, rather than any speculation on metaphysical reality or the absolute origin of things. The wisdom we hear so much of is an intellectual virtue, although it embraces neither speculation nor learning, but is limited to mean sagacity, shrewdness, prudence in the conduct of life. This is the main theme of the Proverbs, but the problem of the correct ordering of life unearths a deeper and darker one--the problem of the existence of evil, the injustice of life as revealed in the blind indiscrimination of trouble, pain, and death. With this problem some of the Psalms and the Books of Job and Ecclesiastes especially deal.