Kudos again to Ron Goldstein for his persistence in naming yesterday's line: it was from Les Miserables, by Victor Hugo.
Today's line (well, more a complex thought than a line) is from a work of one of the U.S.'s great writers:
"I believe that there is one story in the world, and only one. . . . Humans are caught—in their lives, in their thoughts, in their hungers and ambitions, in their avarice and cruelty, and in their kindness and generosity too—in a net of good and evil. . . . There is no other story. A man, after he has brushed off the dust and chips of his life, will have left only the hard, clean questions: Was it good or was it evil? Have I done well—or ill?"