Unity is the preeminent principle of Islam, and this is often interpreted as referring to the monotheistic Oneness of God or, in a slightly broader scope, the intimate relationship between God and Creation at all levels. However, for the sufi, unity (tawhid in Arabic) is the fundamental mystical experience of reality: beneath all appearances to the contrary, the Being of God and our own being are one. We arise from God and return to God, and this truth can be experienced and "known."

Richard Smoley, Jay Kinney, Hidden Wisdom