How can we go to a greater battle? "" He said, "" That is the battle of the self, the battle of the ego. "" The sources of human problems have to do with egotism, "" I. "" The famous Sufi master Rumi, who is very well known to most of you, has a story in which he talks of a man who goes to the house of a friend, and he knocks on the door, and a voice answers, "" Who's there? "" "It's me," or, more grammatically correctly, "It is I," as we might say in English.