“Lust and anger are the passions that must always be kept in check because they darken our spiritual sight. When the sun sets, it gives place to darkness… If we feed “beasts” with our passions, then how can we subdue them? If we are not killing the visible “beast”, then how will we overpower the invisible evil spirits?”
(Hierodeacon Macarie Tanase+, talk in pravoslavie.ru)