Why has man given supreme importance to thought?

'Why has man given supreme importance to thought? - 8 April 1980 Q: Is the ground indifferent to mankind, as the physical universe appears to be? How does one find out if there is something more than the merely physical? Q: Why is it that theories are necessary and useful in organising facts aboutmatter outwardly, and yet inwardly, psychologically they are in the way, of nouse at all? Seeking security for myself, for my family, for my group, for my tribe, hasbrought about division. Why has man given importance to thought as the supreme thing? If I accept I am irrational completely, I am rational.'