I vacillated as I read this. I was often engrossed in Thoreau's twin urges—to simplicity, and to presence in each moment within nature. But I was repelled by his twin delusions—that the poorer a person is, the happier he must be, and that Thoreau himself was aware of the One True Way to live. He spends an awful lot of time disparaging the common actions & manners of virtually every human being other than himself. And over & over again he valorizes poverty, in a way that makes one doubt he's ever actually experienced it.
But after all, those are mostly just faults in the author's voice, and they're more than outweighed by the moments of clarity and presence that suffuse the book. I remembered a lot of the quotes, of course—"In wildness is the preservation of the world", "If you have built castles in the air...", "If a man does not keep pace with his companions, perhaps it is because he hears a different drummer", etc.—but to come across them again in context was to encounter them as new. There's a richness and texture to Thoreau's philosophy that's really quite gorgeous. I was glad to spend time there.