THE NATURE OF CHRISTIAN PHILOSOPHY: The Christian philosophy of 'Aeterni patris' -- Is nature something complete? -- The notion of Catholic philosophy -- The distinguishing feature in Catholic philosophy -- The objectives of the American Catholic Philosophical Association -- Christian conscience vs. Aristotelian right reason -- SOME THEMES IN CHRISTIAN PHILOSOPHY: God in philosophy today -- This truth sublime -- "Darkness of ignorance" in the most refined notion of God -- "Cause of necessity" in Aquinas's 'Tertia via' -- The special characteristic of the Scotistic proof that God exists -- Soul as agent in Aquinas -- Aquinas on the inseparability of soul from existence / Joseph Owens.