Why Christians Differ Doctrinally - Part IX, The Origin of Doctrinal Differences - Are you being intellectually LAZY?

Why Christians Differ Doctrinally - Part XXIII. Conclusion - Q&A, Why Christians Differ Doctrinally - Part XXII., Why Christians Differ Doctrinally - Part XXI. Catholics and Protestants, Why Christians Differ Doctrinally - Part XVII. We continue the study., Why Christians Differ Doctrinally - Part XVI. Questions and Answers!.