Invoking the letters of God's Name without presence of mind is invocation of the tongue; invoking with presence of mind is invocation of the heart; and invoking with an absence of self-awareness because of absorption in the Invoked is the invocation of the Self - this is the hidden invocation!
Ibn Ata AllahWhen the heart becomes empty, the mimbar of the Divine Oneness is placed therein and the sultan of gnosis sits upon it.
Ibn Ata Allah