Why not learn only traditionally Jewish meditation practices as described in Jewish texts that have been preserved?
The great tragedy of the Holocaust disrupted the direct transmission, from teacher to student, of specifically Jewish meditation practices. In the Talmud, we are instructed to meditate for an hour before praying, in preparation for prayer, as well as an hour after, for integration of sacred intentionality into our daily life. While Judaic scholars have been able to learn a great deal from texts describing specific meditation practices, there is a limit to what you can learn from texts.