From Theodor Adorno, Minima Moralia (via Light Reading via Andy Lynn):
No improvement is too small or trivial to be worthwhile. Of a hundred alterations each may seem trifling or pedantic by itself; together they can raise the text to a new level. . . Should the finished text, no matter of what length, arouse even the slightest misgivings, these should be taken inordinately seriously, to a degree out of all proportion to their apparent importance.