https://youtu.be/7_mSPxColVI is the second talk I have heard tonight, the first being one by Peter Fenwick from England on Ted Talks and Youtube. There are many levels of existence (11 levels...) and much we don't comprehend (see 30 minutes into this talk which says we are 'stuck with our old scientific views that we are in 4-D, but that's only 4% of our world.)
String theory explores that thought underlies the reality of the universe...moreso than matter.