David therefore departed thence, and escaped to the cave Adullam: and when his brethren and all his father's house heard it, they went down thither to him. And every one that was in distress, and every one that was in debt, and every one that was discontented, gathered themselves unto him; and he became a captain over them: and there were with him about four hundred men. [1 Samuel 22:1-2]
When we read the story of David in the Bible and see how he was anointed king over Israel by Samuel, he didn’t take his place at the throne immediately and start ruling. He had to wait, until Saul was removed from power, before succeeding to the throne as King. Like His earthly ancestor David, Jesus, was received as Israel's king at the triumphal and joyful entry, which is called "Palm Sunday" by most of the Christian World, and then he was anointed King of the Jews, He received His true title from the Romans, when they hung him on the cross. But He is still waiting to reveal His identity as King on earth, and that will be when His kingdom will replace the kingdoms of this world at His second Second Coming. [Rev. 11:15].
Now, while David was waiting for his kingship to take place, he was chased and persecuted by Saul, driven into the wild and caves, and places in the Land. There, he found other outcasts who became his followers; men who were in distress, in debt, or discontented in one way or another; those that felt they had no part in this life any longer.
Rather than casting these people away from him, because, after all he was a king, David drew them to himself, by the anointing on his life and the strength of his character; and they, of all people, recognized that he was the chosen King of Israel. David's true kingly nature embraced these lowly men and transformed them into a mighty army.
Jesus does exactly the same with us, even while He has been rejected as king of this world. Outcasts, broken, indebted, despised, discontented people like what is found in[1 Cor. 1:26-28] are chosen out of the world, and transformed by Him into powerful vessels to serve his purposes while we wait for His kingdom to come. We are the Lord's army!
The people in this world who are in distress, or struggling with debt, or unhappy with their life. Need to met the outcast King of the Jews? In fact, to go a step further, the whole world needs to meet our soon coming King! They need to follow the One whose own people did not receive Him. His present kingdom is not of this world, because He's waiting for His house to be filled, before He returns? People need to recognize the One who this old world has not known and serve Him! We are called, like the men who were around David. However we must remember, that our battle is not with flesh and blood like it was in David's time, but it is against principalities, against powers, against the rulers of the darkness of this age, against spiritual hosts of wickedness in the heavenly places.