Satan’s third brigade is even more subtle. We read about it in Selected Messages, Book 2, 19. “If Satan sees that the Lord is blessing His people and preparing them to discern his delusions, he will work with his master power to bring in fanaticism…”
Stumbling blocks may prevent many people today from attending church. The Spirit of Prophecy tells us that God does not bring new people into the church because of the unconverted state of many of its current members. He sees that since church members do not rightly represent Him, He refrains from bringing in new people until these stumbling blocks are removed.