hay pocas personas que consientan en decir lo que creen, sino también porque muchas lo ignoran, pues el acto del pensamiento, por el cual uno cree una cosa, es diferente de aquel otro por el cual uno conoce que la cree,

El mal de no creer es creer un poco.

diga lo que piensa y crea en lo que dice”; de preferencia, dígalo con pocas y bien escogidas palabras.

When people say that I may not speak, they forget that I may well think. I may think what I want, like everyone else. I shall just refrain from saying everything I think. That might be something many people should do once in a while.

Except for those who think in terms of pious platitudes or dogma or narrow prejudice (and those thoughts we aren’t interested in), people don’t speak their beliefs easily, or publicly.

The world is filled with polite, shy, inscrutable, unintelligible, tight lipped, superficial, dishonest and also honest people who for one reason or another do not say what they think. The search for freedom of speech has barely begun. Many do not reveal their thoughts because they are not sure what they think. Many would be braver in their speech if they were more certain of a sympathetic hearing. Many, particularly in places where success depends on conformity, are schooled to be hypocrites. The hidden thoughts in other people’s heads are the great darkness that surrounds us.

It isn't what people think that's important, but the reason they think what they think.

Quanto que el no creer es indicio del mentir; porque el mentiroso tiene dos males, que ni cree ni es creído.

More often than not, it seems that people are having thoughts, though not really thinking about what they’re thinking about — at least not in an effective way that resolves, advances, or manages the content.

People think they think, but it’s not true. It’s mostly self-criticism that passes for thinking. True thinking is rare — just like true listening. Thinking is listening to yourself. It’s difficult. To think, you have to be at least two people at the same time. Then you have to let those people disagree. Thinking is an internal dialogue between two or more different views of the world.

It takes lots of courage to say always what you think. The trouble is, we think things sometimes we ought not to say.

Tem de admitir-se que é verdade que saber qualquer coisa não implica pensar nisso - mas alguém que saiba de alguma coisa não tem de ser capaz de duvidar dela? E duvidar significa pensar.

The most difficult thing to accept for people who work hard at forming their beliefs on the basis of evidence is that not everyone forms their beliefs in that way. [...] Many people believe what and how they do precisely because they do not formulate their beliefs on the basis of evidence-- not because they're lacking evidence.

Pensar es la tarea más dura que existe; por eso, probablemente, son tan pocos los que se dedican a ella.