" If there are any persons who contest a received opinion,
or who will do so if law or opinion will let them, let us thank
them for it, open our minds to listen to them, and rejoice
that there is some one to do for us what we otherwise ought,
if we have any regard for either the certainty or the vitality of
our convictions, to do with much greater labor for ourselves. "

― John Stuart Mill , On Liberty