In his old age he reached the clear conviction that nothing but the advice of the great dread spirit could build up any tolerable sort of life for the feeble, unruly, ’incomplete, empirical creatures created in jest.’
There are no more uses of "empirical" in the book.
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Is her theory supported by empirical data?
Empirical studies provide inputs for our formulas, but the formulas themselves are largely based upon intuitive values.