There is David's faith in God. He didn't presume that God would bring him back, and he didn't have superstitious ideas that somehow he would win, just because the ark—this holiest of all items in the nation—was with him. No, David's faith was in God and he knew that God would make the right decision. Would He bring David back or was David about to be replaced by his son, Absalom? So David, in faith, was going to let God decide which way it was going to be.
Now, you see, there is our approach. David said the ark is to be where God said it is to be—in the place where God has placed His name. Not where David, in his anxiety, might feel justified to move it. You see there is a man of faith.