Plato: Republic, Book III. Translations by Jowett and Vaughan. (Criticism of religion from the stand-point of morality and politics.)
St. Augustine: Confessions. Translation by Pusey. (Document of religious experience.)
Thomas à Kempis: Imitation of Christ. Translation by Stanhope. (Mediæval programme of personal religion.)
Spinoza: Theological-political Treatise. Translation by Elwes. (One of the first great pleas for religious liberty and one of the first attempts to define the essential in religion.)
Kant: Critique of Pure Reason—the Canon of Pure Reason. Translation by Max Müller. Critique of Practical Reason. Translation by Abbott in Theory of Ethics. (Defines religion as the province of faith, distinguishes it from knowledge, and relates it to morality.)
Schleiermacher: On Religion. Speeches to its Cultured Despisers. Translation by Oman. (Ponderous, dogmatic in its philosophy, but profound and sympathetic in its understanding of religion.)
Arnold: Literature and Dogma. (On the essence of religion as exemplified in Judaism and Christianity.)
Sabatier, A.: Outlines of a Philosophy of Religion based on Psychology and History. Translation by Seed. Religions of Authority and the Religion of the Spirit. Translation by Houghton. (These books emphasize the essential importance of the believer's attitude to God.)
James, William: The Varieties of Religious Experience. (A rich storehouse of religion, sympathetically interpreted.)