The late Herbert W. Armstrong claimed to restore 18 truths to the Philadelphia era of the Church of God that the previous era, (Smyrna) had lost. He also claimed that the Ephesus era of the Church of God knew these truths. In this sermon, Dr. Thiel quotes Herbert Armstrong, the Bible, and early church writings to demonstrate that early professors of Christ were familiar with these truths. In this second part of a two-part sermon, Dr. Thiel goes through the last ten truths Herbert Armstrong once listed that God used him to restore: 9. Knowledge of What the Millennium Truly Is, 10. Truth About the Holy Spirit, 11. Christians are Begotten Now, 12. Born-Again at the Resurrection, 13. Identity of Physical Israel, 14. How the Identity of Israel Opens Up Understanding of Bible Prophecy, 15. Second and Third Tithes, 16. Identity of Babylon and Her Daughters, 17. Satan has Deceived the Whole World, and 18. We Are to Be Separate. Dr. Thiel also mentions that the list of 18 truths that the Tkach Administration put out were NOT the same as those that Herbert Armstrong listed and missed several of these. Dr. Thiel also listed all 18 of the 'restored truths' at the end of the sermon.
A written article of related interest is titled "18 Truths Restored to the Churches of God" URL: http://www.cogwriter.com/18.htm
Part 1: The 18 Restored Truths: 1-8