Answer:
- The South insists on continuing the practice of slavery.
- The North will attempt to preserve the Union at any cost.
In this excerpt, William Lloyd Garrison argues that the reason why the South is becoming a lot more powerful than the North is that the South does not plan to give up slavery at all. He says that "the preservation of slavery is paramount to all other considerations above party success, denominational unity, pecuniary interest, legal integrity, and constitutional obligation." As the South completely depends on slavery, they will not compromise.
On the other hand, the North is willing to do almost anything to preserve the Union, up to the point of "idolatry." This means that the South has the upper hand in the relationship.