Nevertheless, in His revealed way of acting through the Sefirot, Eyn Sof chose to act in a way similar to the way in which a person acts, using a variety of different powers and abilities. This is what is meant by the statement of the rabbis that “The world was created with ten sayings... yet surely, it could have been created with only one!?!” (Avot 5:1). Accordingly, we differentiate a specific, separate cause corresponding to every manifest work or action.
…of the attributes of Eyn Sof, blessed be He… This indicates that the Sefirah is not a mere derivative that is caused by, outside of and secondary to Eyn Sof. For His Will is a single unity. In its intrinsic limitlessness, His will is invisible, and this is what we call Eyn Sof. Those aspects of this Will that are revealed we call the Sefirot, but the Will itself is Eyn Sof – limitless and indefinable. This is why we say that the Sefirot are the attributes of Eyn Sof.