How are you
Fine (okay, well), thank you
Mantras of the day
Good is another way of saying "God"
Goodbye was originally "God be wi' ye" (God bw'ye - now generally shortened to "Bye")
Fine originates from the word: final
O.K. seems to come from a president from the 1800's. (The O.K. Club the Democratic party's political club of 1840: apparently for Old Kinderhook, the nickname of Martin van Buren (president of the U.S.A. in 1837-41).
Well means according to one's wish.
When we describe "how we are" we're repeating directives to our cells: we're fine, good, okay, well, could be better, don't ask...
Everyday small talk - with a large effect.