What are the principles of the Sufism?

In "The Way of Illumination", Inayat Khan writes of ten principle Sufi thoughts that are the fundamentals of Universal Sufism:

"1. There is One God, the Eternal, the Only Being; None exists save He
2. There is One Master, the Guiding Spirit of all souls, Who constantly leads all followers toward the Light
3. There is One Holy Book, the Sacred Manuscript of Nature, the only Scripture that can enlighten the reader
4. There is One Religion, the unswerving progress in the right direction toward the Ideal, which fulfills the life's purpose of every soul
5. There is One Law, the Law of Reciprocity, which can be observed by a selfless conscience, together with a sense of awakened justice
6. There is One Brotherhood, the human brotherhood which unites the children of earth indiscriminately in the fatherhood of God
7. There is One Moral, the Love which springs forth from self-denial and blooms in deeds of beneficence
8. There is One Object of Praise, the Beauty which uplifts the heart of its worshiper through all aspects from the seen to the unseen
9. There is One Truth, the true knowledge of our being, within and without, which is the essence of Wisdom
10. There is One Path, the annihilation of the false ego in the real, which raises the mortal to immortality, in which resides all perfection" (Sufi Message).
-Whitnee