Jabez: Conceived In Pain, Delivered In Victory

Jabez discovers he cannot take his place on the battlefield to avenge the death of his family. He is forced to remain and rebuild his village. Jabez is visited by an old enemy, but is not able to discern the enemy's presence. His guilt and shame gnaw at him, causing him to sink into depression. How come Jabez cannot sense the Accuser's presence? What does the Accuser say that forces Jabez into the pit of despair? Why does Sh'muel want to spend time with Jabez? (Chapters 47 - 49)