Herbert Spencer, from whose Philosophy of Style the preceding paragraph is quoted, illustrates the principle by the sentences:

In proportion as the manners, customs, and amusements of a nation are cruel and barbarous, the regulations of their penal code will be severe.In proportion as men delight in battles, bull-fights, and combats of gladiators, will they punish by hanging, burning, and the rack.

[13.] Omit needless words.

Vigorous writing is concise. A sentence should contain no unnecessary words, a paragraph no unnecessary sentences, for the same reason that a drawing should have no unnecessary lines and a machine no unnecessary parts. This requires not that the writer make all his sentences short, or that he avoid all detail and treat his subjects only in outline, but that he make every word tell.

Many expressions in common use violate this principle:

the question as to whetherwhether (the question whether)
there is no doubt but thatno doubt (doubtless)
used for fuel purposesused for fuel
he is a man whohe
in a hasty mannerhastily
this is a subject whichthis subject
His story is a strange one.His story is strange.

In especial the expression the fact that should be revised out of every sentence in which it occurs.

owing to the fact thatsince (because)
in spite of the fact thatthough (although)
call your attention to the fact thatremind you (notify you)
I was unaware of the fact thatI was unaware that (did not know)
the fact that he had not succeededhis failure
the fact that I had arrivedmy arrival

See also under [case], [character], [nature], [system] in [Chapter V].