Shimon bar Yochai was a prominent Jewish sage and mystic who lived in the 2nd century CE. He is best known for his teachings in the Kabbalah, particularly the Zohar, a foundational work of Jewish mysticism. Bar Yochai is often associated with the Talmud, where he is depicted as a disciple of Rabbi Akiva. He is traditionally credited with the authorship of the Zohar and is celebrated on the holiday of Lag BaOmer, which commemorates his life and teachings. His legacy continues to influence Jewish thought and spirituality, making him a significant figure in Jewish history.