Zahavasdad,
I’m sorry but you are incorrect but meditation is a very jewish thing. HOWEVER, it is resevered for those at a very high level of knowledge of Sod and purity. Most modern day meditaiton is not that and are from non-jewish sources many of which are actual A”Z like TM.
Rabbi Kaplan’s books say some things but of course hide a great deal. Please remember that the Shulchan Aruch states (RM”A) that you should only learn sod after 40 years old and when your stomach is full of Gemara and Halacha.