Human Nature in its Fourfold State

Human Nature in its Fourfold State is a 1720 book by Scottish Presbyterian theologian and philosopher Thomas Boston. Boston organizes human nature into four aspects: Primitive Integrity, Entire Depravity, Begun Recovery, and Consummate Happiness or Misery. The correspond to Augustine of Hippo's four own figured states: able to sin, able not to sin (posse peccare, posse non peccare), not able not to sin (non posse non peccare), able not to sin (posse non peccare), unable to sin (non posse peccare).[1][2]