Preferring the active voice to the passive voice (to use the terms from formal grammar) whenever feasible is the universal recommendation of writing instruction in English, e.g. by everyone from Strunk & White to the Random House Handbook to George Orwell.<p>As noted by others in this thread, the active voice puts the focus on the actor, i.e. the grammatical subject. This lends the construction vigor. The passive voice, which puts the focus on the grammatical object, is weak and even dull by comparison.<p>As well, by diminishing the actor, the passive voice can serve to evade responsibility and accountability: "The campaign finance rules were violated by the senators." rather than the more pointed "The senators violated the campaign finance rules." This convenient effect explains the prevalence of the passive voice in bureaucratic prose, which was Orwell's particular bête noire.<p>The active voice is also less "wordy," which improves the vigor of the style. In the example I just gave, the word count is 9 versus 7. I achieved the lower count by removing an auxiliary verb ("were") and a preposition ("by").<p>Now, I could have written the previous sentence like this: "The lower count was achieved by removing an auxiliary verb . . ." etc. Here the passive voice is probably preferred, because the actor, "I", is not of significance, and may even distract.<p>The passive voice does have its uses, hence the caveat "whenever feasible" in the first sentence above.