“A people's literature is the great textbook for real knowledge of them. The writings of the day show the quality of the people as no historical reconstruction can.”
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None but a poet can write a tragedy. For tragedy is nothing less than pain transmuted into exaltation by the alchemy of poetry.
Checking the results of a decision against its expectations shows executives what their strengths are, where they need to improve, and where they lack knowledge or information.
To acquire knowledge, one must study but to acquire wisdom, one must observe.
The shortest and surest way of arriving at real knowledge is to unlearn the lessons we have been taught, to mount the first principles, and take nobody's word about them.