Most Sufis believe that the great religions and mystical traditions of the world share the same essential Truth. The various prophets and spiritual teachers are like the light bulbs that illuminate a room. The bulbs are different, but the current comes from one source, which is God. It is the same light; each of the individual bulbs receives electricity from a single source. The quality of the light is always basically the same, and so is the original source.
— James Fadiman, Robert Frager, Essential Sufism by James Fadiman, editor, Robert Frager, editor