Abortion and slavery — both involve culturally hardened consciences that must be awakened; the church must keep speaking

Mike compares the hardened conscience of people in the antebellum South regarding slavery to the hardened conscience of contemporary people regarding abortion. Just as abolitionists had to keep speaking loudly against slavery despite cultural opposition, the church must keep speaking against abortion. The more people disagree, the louder Christians must be. He frames this as part of the core calling of the Christian church — calling people to repentance.