Kabbalah & Chassidus

Anyone who has studied Chassidus, such as Toldos Yaakov Yosef, Meor VaShemesh, Tanya, Kedushas Levi, knows that the Zohar and Kabbalah are often quoted. Should a person shy away from these teachings too? Definitely not! The Codifiers - Beis Yosef, RaMa, Magen Avraham, Taz, Shakh, Mishnah Berurah and so on, all quote the Zohar and the writings of the Ari. So do many other authors of works on the Revealed Torah. The warnings against studying Kabbalah, for those not worthy, refer to a straight and analytical study of a basic Kabbalah text. They do not apply to short passages quoted in other works.

(Rabbi Zvi Aryeh Rosenfeld)