Online Christian Courses

Instructor || Welcome to the Course!

Introducing Sophia - Your Course Guide

Course Guidelines

Dr. Geisler's Course Notes, and Primary and Secondary Sources

Assignments Overview | Short Summaries of Course Assignments

Beginning of Course Survey

Primary Sources Infographic PDFs

Plato's Republic Books 1 - 7

Aristotle's Metaphysics Book XII

Plotinus’ Enneads

Augustine’s City of God – Books 11 and 12

Thomas Aquinas’ Summa Contra Gentiles

1.2 | Socrates, Truth, and General Revelation: Can Reason Lead to God?

Quiz #1

Answers to Questions

Assignment #1 | Socratic Conversation Report DUE SEPT. 20

Plato: In My Own Words

Questions to Download

2.1 | Plato: Why Objective Truth Requires Something Beyond This World

2.2 | The Theory of Forms: Defending Objective Truth in a Relativistic World

2.3 | The Form of the Good: Is There an Ultimate Standard of Reality and Morality?

2.4 | Plato’s Dualism: The Soul, the Afterlife, & the Limits of Greek Philosophy

Answers to Questions

Quiz #2

Plato Apologetics Toolkit

Aristotle: In My Own Words

Questions to Download

3.1 | Aristotle: Bringing Forms Down to Earth

3.2 | Motion, Causation, and the Four Causes

3.3 | The Unmoved Mover and the Foundation of Classical Theism

Answers to Questions

Quiz #3

Assignment #2 | Explaining the Unmoved Mover DUE OCT. 4

Aristotle Apologetics Toolkit

Questions to Download

4.1 | Jesus: The Claim to Be Truth Itself

4.2 | Jesus and the Fulfillment of Philosophy

Answers to Questions

Quiz #4

Assignment #3 | Worldview Interview & Analysis DUE OCT. 11

In My Own Words: Plotinus

Questions to Download

5.1 | The One Beyond Being: A God Without Personality or Thought

5.2 | Unity vs. Multiplicity: Does Ultimate Reality Erase Distinctions?

Assignment #4 | Is Jesus the Only Way? DUE OCT. 18

6.1 | Pantheism Explained: How Everything “Flows” from the One

6.2 | Is Matter Almost Evil? The Dangerous Hierarchy of Being

6.3 | Beyond Reason: The Mystical Leap That Abandons Truth

7.1 | Can We Speak Meaningfully About God? The Problem of Negative Theology

7.2 | From Plotinus to Modern Skepticism: Why God Becomes Unknowable

7.3 | The Long Shadow of Plotinus: Pantheism, Islam, and Modern Theology

Answers to Questions

Quiz #5

In My Own Words: Augustine

Questions to Download

8.1 | Augustine’s Conversion and Intellectual Awakening

8.2 | Grace, Predestination, and the Turning Point of 417

8.3 | Faith and Reason: Why Augustine Was Not a Presuppositionalist

8.4 | The Argument from Truth and Divine Illumination

FINAL CAPSTONE Assignment #5 | Philosophy for the Church DUE NOV. 23

Answers to Questions

9.1 | The Classical View of God and the Defense of Divine Attributes

9.2 | Augustine’s Love Ethic and the Nature of Moral Obligation

9.3 | The Problem of Evil: Evil as Privation

9.4 | Moral Conflict: Lying, Absolutes, and the Greater Good

9.5 | Augustine’s Influence: From Medieval Theology to Modern Christianity

Quiz #6

Questions to Download

10.1 | Anselm: Faith Seeking Understanding

10.2 | The Ontological Argument: Can God Be Proven by Definition?

10.3 | Necessary Being, Contingency, and Kant’s Critique

10.4 | Avicenna and the Contingency Argument: The Islamic Roots of Scholastic Thought

10.5 | The Rise of Islamic Philosophy

10.6 | Al-Ghazali and the Crisis of Causality

Answers to Questions

Quiz #7

In My Own Words: Aquinas

Questions to Download

11.1 | Why Aquinas Matters: Faith, Reason, and Natural Theology

11.2 | Aquinas the Thinker: His Works and Influence

11.3 | How We Know: Aquinas on Faith, Reason, and Knowledge

11.4 | From Knowledge to Reality: Being, Causality, and Metaphysics

12.1 | Creation, Necessity, and the Nature of God

12.2 | The Five Ways: Overview of Aquinas’ Arguments

12.3 | The First Way: Motion (Unmoved Mover)

12.4 | From Motion to Pure Act: Why God Must Exist

13.1 | From the Five Ways to God’s Nature: Pure Act, Eternity, and Infinity

13.2 | Knowing God by Analogy: How Creation Points to the Creator

Answers to Questions

Quiz #8

End of Course Survey