Here we have a king who is instructed to actually carry a small copy of the Torah with him, and, in fact it was supposed to be attached to his garment. One of the points of this was for the leader to be honest, conscious, ethical, and to not be overwhelmed by possessions! Hmmmmm. He was not to have a large herd of horses, nor have too much money, nor have more than 18 concubines. And when the king connects to Torah, as we too can, then our souls become the body of flowing waters of truth, shown here as the waters in his chest.