Herein lies the point of the practical, or you may say if you choose, the didactical, side of the question; the point where our music touches our longevity.
"Seed Thoughts for Singers"
Frank Herbert Tubbs
Finally, just as in historical and especially in narrative literature, Persian tradition survived to the Musalman times so also it continued to live in the writings of the ethico-didactical category.
"Iranian Influence on Moslem Literature, Part I"
M. Inostranzev
These, however, are not the didactical portions of the book, but the proofs and examples; which, according to the custom of the ancient grammarians, ought to be taken from other authors.
"The Grammar of English Grammars"
Goold Brown