What is the main conflict in Oscar and Lucinda by Peter Carey?

Oscar and Lucinda is a satire about two star-crossed lovers that takes place in the mid-nineteenth century. Oscar Hopkins is a contradictory man, both pious and corrupt. He was raised by a strict, religious father, but he abandons his father's religion in favor of Anglicanism. He spends the rest of his life wondering if his decision has damned his soul to hell, as his father believes.