Was artur Rubinstein the polish pianist involved in spiritism?

Artur Rubinstein, the renowned Polish pianist, was known for his exceptional musical talent rather than any involvement in spiritism. While he had a deep interest in various philosophical and spiritual matters, there is no substantial evidence linking him directly to spiritism as a practice. His legacy primarily lies in his contributions to Classical Music and his interpretations of works by composers like Chopin and Rachmaninoff.