Petichah LeChokhmat HaKabbalah (Introduction to the Wisdom of Kabbalah) is Rabbi Yehuda Ashlag’s introduction to the study of kabbalah, consisting of 188 brief sections. It serves as a condensed outline of the author’s more extensive Talmud Eser Sefirot. The work opens with explanations of basic concepts in kabbalah, such as light, contraction (“tzimtzum”), and the breaking of vessels.