Update 2020-07-08:
One of the few books everybody should know.
• "In the case of any person whose judgment is really deserving of confidence, how has it become so? Because he has kept his mind open to criticism of his opinions and conduct. Because it has been his practice to listen to all that could be said against him; to profit by as much of it as was just, and expound to himself, and upon occasion to others, the fallacy of what was fallacious. Because he has felt that the only way in which a human being can make some approach to knowing the whole of a subject, is by hearing what can be said about it by persons of every variety of opinion, and studying all modes in which it can be looked at by every character of mind. No wise man ever acquired his wisdom in any mode but this; nor is it in the nature of human intellect to become wise in any other manner." p.22
• "First, if any opinion is compelled to silence, that opinion may, for aught we can certainly know, be true. To deny this is to assume our own infallibility."
• Secondly, though the silenced opinion be an error, it may, and very commonly does, contain a portion of truth.."
"No one can be a great thinker who does not recognize, that as a thinker it is his first duty to follow his intellect to whatever conclusions it may lead."
John Stuart Mill’s writings is surely a goldmine of the clearest philosophical thought expressed in the best English, humbleness and brilliant arguments you can find in philosophy as a whole. The thinking is so modern and still balanced with his encyclopedic knowledge of the classics. He urges us to listen to others and consider a variety of opinions and to be able to argue the other side. His “on liberty” was concidered a classic when published and hade huge influence on how we view freedom for the individual in society. His subject is the nature and limits of the power that can be legitimately excercised by society over the individual. This is timeless wisdom indeed!