The "spirits" are actually fallen angels, - angels who sided with Satan in his great rebellion and were driven out of heaven along with him.
Vanhu vo tala lava khongelaka, va khongela eka "vakwetsimi" vo tano ni le ka tintsumi va tshemba leswaku swivumbiwa sweswo swi ta hundzisela swikhongelo swa vona eka Xikwembu.