Remember that everyone has opinions and they are often bad. Opinions are easy to produce; everyone has plenty of them and most people are eager to share them — even to fight for them. Unfortunately many are worthless or even harmful, including a lot of your own.

Don’t mistake assertiveness or eloquence for good ideas.

¿No te parece suficientemente bien dicho que no hay que respetar todas las opiniones de los hombres, sino unas sí y otras no; ni todas las de todos, sino las de uno sí y no las de otros? De ser así, ¿no serán las buenas precisamente las de los sensatos, y las malas las de los insensatos?

...[S]ome of the opinions which people entertain should be respected, and others should not.

I would not have the reader conclude that because I advocate plain-speaking even of unpopular views, I mean to imply that originality and sincerity are always in opposition to public opinion. There are many points both of doctrine and feeling in which the world is not likely to be wrong. But in all cases it is desirable that men should not pretend to believe opinions which they really reject, or express emotions they do not feel. And this rule is universal. Even truthful and modest men will sometimes violate the rule under the mistaken idea of being eloquent by means of the diction of eloquence. This is a source of bad Literature.

Think not that your word and yours alone must be right.

Everything you say should be true, but not everything true should be said.

Remember that all is opinion.

Opinions have no value, though the whole world is run on opinions. Opinions are limited. Your opinion, or my opinion, the opinions of the totalitarians, or the opinions of the church people and governments are all limited. Your judgments and opinions that give values are all limited. When you think about yourself from morning until night, as most people do, that is limited. When you say you are Swiss, or when you are proud to be British as though you are God’s chosen people, that is limited. So opinions are limited. When one sees that clearly, then one does not cling to opinions or the values that opinions have created, because your opinion against another opinion doesn’t bring about peace. That is what is happening in the world, one ideology against another ideology — communist, socialist, democrat, and so on. So please understand that if you are adhering to your opinion and I am sticking to mine, then we shall never meet.

There must be freedom from opinion and values so that we are actually not holding back our opinions and using them as axes to beat each other, to kill each other. Opinions are limited and therefore they must inevitably bring about conflict. If you hold on to your limited conclusions, and another holds his limited conclusions, experiences, then there must be conflict, wars, destruction. If you see that very clearly, then opinions become very superficial, they have no meaning. Don’t have opinions, but be free to inquire, and in that inquiry act. The very inquiry is action; it is not that you inquire first and then act, but in the process of inquiry you are acting.

No se debe confundir la verdad con la opinión de la mayoría.

But every difference of opinion is not a difference of principle.

Remember that just because other people agree or disagree with you doesn’t make you right or wrong — the only thing that matters is the correctness of your analysis and judgment.

All opinions are not equal. Some are a very great deal more robust, sophisticated and well supported in logic and argument than others.

No opinion should be disdained and scorned.