The Great Divide (Direct Experience) Harvard Psychiatrist John Mack explore the “great divide” between the material realms and the subtle realms. Please rate the material for credibility. Your input is totally anonymous.Please enable JavaScript in your browser to complete this form.Was reading or watching this post worthwhile?YesNoHow credible do you find the claims presented in this material?ValidHighly plausibleSomewhat plausibleUnlikelyVery unlikelyAbsurdUse this space for any optional comments:MessageSubmit Share with your friends: