is, not to show that the heathen were, by their depravity, incapacitated to know God, but that because they knew God and knew his righteous law, therefore their depravity and licentiousness was "inexcusable." [Footnote 379: Romans, ch. i. ver. 23-32.] We conclude our review of opposing schools by the re-affirmation of our position, _that God is cognizable by human reason._ The human mind, under the guidance of necessary laws of thought, is able, from the facts of the universe, to affirm the existence of God, and to attain some valid knowledge of his character and will. Every attempt to solve the great problem of existence, to offer an explanation of the phenomenal world, or to explore the fundamental idea of reason, when fairly and fully conducted, has resulted in the recognition of a Supreme _Intelligence_, a personal _Mind_ and _Will_, as the ground, and reason, and cause of all existence. A survey of the history of Greek Philosophy will abundantly sustain this position, and to this we shall, in subsequent chapters, invite the reader's attention. CHAPTER VIII. THE PHILOSOPHERS OF ATHENS. PRE-SOCRATIC SCHOOL. SENSATIONAL: THALES--ANAXIMENES--HERACLITUS--ANAXIMANDER--LEUCIPPUS--DEMOCRITUS. "Then certain philosophers of the Epicureans and of the Stoics encountered Paul."--Acts xvii. 18. "Plato affirms that this is the most just cause of the creation of the world, that works which are good should be wrought by the God who is good; whether he had read these things in the Bible, or whether by his penetrating genius he beheld _the invisible things of God as understood by the things which are made_"--ST. AUGUSTINE, "De Civ. Dei," lib. xi. ch. 21.