Prose is use of language in a higher plane than the language used in conversation or writing of educated common people. Higher plane does not mean high sounding or archaic words.
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The best known description of ‘good English’ is “proper words at proper places”. No two words mean exactly the same. A word gets meaning only from its context. Without the context word is meaningless. Language is a convention of using each word only in its context. Mingling words of older classical days with ultra modern vocabulary is futile unless it is used for a specific effect. Using substitutes to suit rhyme or for variety is not appreciated.
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Here are a few examples of widely appreciated prose.
“Men fear death as children fear to go in darkness.”
“Revenge is a kind of wild justice.”
“I have no belief in belief.”
My teacher spoke for an hour on each of these sentences.
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