Diction - Purity - Propriety - Precision.
Strength is that property of style which gives animation, energy and
vivacity to language and sustains the interest of the reader. It is as
necessary to language as good food is to the body. Without it the words
are weak and feeble and create little or no impression on the mind. In
order to have strength the language must be concise, that is, much
expressed in little compass, you must hit the nail fairly on the head and
drive it in straight. Go critically over what you write and strike out
every word, phrase and clause the omission of which impairs neither the
clearness nor force of the sentence and so avoid redundancy, tautology
and circumlocution. Give the most important words the most prominent
places, which, as has been pointed out elsewhere, are the beginning and
end of the sentence.