The art of war will provide a parallel:
it is no doubt based on certain general principles,
but it will none the less be far more useful to know
the methods employed, whether wisely or the reverse, by individual generals under varying circumstances and conditions of time and place. For there
are no subjects in which, as a rule, practice is not
more valuable than precept.
Quintilian. With an English Translation. Harold Edgeworth Butler. Cambridge. Cambridge, Mass., Harvard University Press; London, William Heinemann, Ltd. 1920.
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