The knowledge of Allah follows upon the dissolving of the ego, fana, says Sufism. But some Sufi masters go even farther and assert that it follows only on the dissolving of this dissolving (fana-el-fana). What does this strange statement mean? The answer is nonduality. What nonduality itself means is to be gleaned from another Sufi declaration: "The outer path: I and Thou. The inner path: I am Thou and Thou are I. The final insight: neither I nor Thou."
-- Notebooks Category 25: World-Mind in Individual Mind > Chapter 2: Enlightenment Which Stays > # 117