A man does not want to believe that he is proud, or cowardly, or lazy, or hotheaded; he wants to believe that he is the right sort; and although his conscience reproaches him for his faults, he prefers to suppress the feeling he has of them, than to have the unpleasantness of knowing about them.

Une preuve convaincante que l’homme n’a pas été créé comme il est, c’est que plus il devient raisonnable et plus il rougit en soi-même de l’extravagance, de la bassesse et de la corruption de ses sentiments et de ses inclinations.

Man prefers to believe what he prefers to be true.

L'homme a un penchant naturel à imaginer des théories correctes de toutes espèces... Si l'homme n'était pas doué d'un esprit adapté à ses besoins, il n'aurait jamais pu acquérir aucune connaissance

When the intensity of emotional conviction subsides, a man who is in the habit of reasoning will search for logical grounds in favour of the belief which he finds in himself.

L'homme croit souvent se conduire lorsqu'il est conduit; et pendant que par son esprit il tend à un but, son coeur l'entraîne insensiblement à un autre.

C'est une maladie naturelle à l'homme de croire qu'il possède la vérité directement…

Si c'est la raison qui fait l'homme, c'est le sentiment qui le conduit.

[...] men are not astonish'd at the operations of their own reason, at the same time, that they admire the instinct of animals, and find a difficulty in explaining it, merely because it cannot be reduc'd to the very same principles. [...] reason is nothing but a wonderful and unintelligible instinct in our souls[.]

Man is a credulous animal, and must believe something; in the absence of good grounds for belief, he will be satisfied with bad ones.

If any man can convince me and bring home to me that I do not think or act aright, gladly will I change; for I search after truth, by which man never yet was harmed. But he is harmed who abideth on still in his deception and ignorance.

People don't like being convinced that they're wrong. In fact, our brains are unmatched in their ability to self-justify, to make us feel that we are right and to shut out any information that contradicts that. On a purely logical level, most people aren't going to be moved on a incorrect belief they have by arguing with them about it.

According to his opinion, man should only believe what he can grasp with his intellectual faculties, or perceive by his senses, or what he can accept on trustworthy authority. Beyond this nothing should be believed.

Il est dangereux d'avoir raison dans des choses où des hommes accrédités ont tort.