In response to a question about the ten sefirot and Chabad methodology, the Rebbe notes the well-known distinctions in Kabbalah, as explained in Chassidus and the writings of the Alter Rebbe. He emphasizes study of the three daily lessons in Chumash, Tehillim, and Tanya.
https://www.torahrecordings.com/rebbe/igroskodesh/016/004/5969