Mason & Dixon by Thomas Pynchon. A review on Goodreads sums up the introspective qualities quite well:
>it is a loping colloquy between Faith and its mate Reason, Free Will and its mate Fate; I read in it that I should make my way West to go with the day, with Time, maturation, aging, having children, the coming of the next generation, the slow fading and dispersal at sunset- and East if I wish to go against the day, into the past, toward morning, the smokeless altars of memory, to youth… where we can’t ever stay for long, because the terrain has started to go missing, there is less firm land under foot to hold and lift us, and our Lines must again resume their inexorable Westerly course...
>it is a loping colloquy between Faith and its mate Reason, Free Will and its mate Fate; I read in it that I should make my way West to go with the day, with Time, maturation, aging, having children, the coming of the next generation, the slow fading and dispersal at sunset- and East if I wish to go against the day, into the past, toward morning, the smokeless altars of memory, to youth… where we can’t ever stay for long, because the terrain has started to go missing, there is less firm land under foot to hold and lift us, and our Lines must again resume their inexorable Westerly course...