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 about matter outwardly, and yet inwardly, psychologically they are in the way, of no use at all? • Seeking security for myself, for my family, for my group, for my tribe, has brought about division. • Why has man given importance to thought as the supreme thing? • If I accept I am irrational completely, I am rational."