In Sufism, the term nafs is generally used in the sense of "that which incites to wrongdoing." This includes our egotism and selfishness, our greed and unending desire for more things, our conceit and arrogance. Perhaps the best translation for this part of us is the "lower self."
— James Fadiman, Robert Frager, Essential Sufism by James Fadiman, editor, Robert Frager, editor