Conventional people, fond only of commonplace ideas, may feel shocked at some philosophical statements. They do not see that their thinking is falsified because they have prejudiced their quest of truth from the start, because it is done within the context of conventional attitudes. How few can free themselves from the thick incrustations of prejudice; how many are unable to approach an idea with calm, impersonal, detached open-mindedness! Most people naturally pick out from a teaching those views which please them and reject the others. Only the seeker who has disciplined himself morally and intellectually will be heroic enough to take unpleasing views along with the pleasing ones. Philosophy's teaching will appeal, and can only appeal, to those who have striven to escape from dogmatism, who have shaken off widespread prejudices and outgrown crudely materialistic ideas, and whose minds are sufficiently developed to realize the value of free views and flexible attitudes. Where that has been insufficiently achieved, a special discipline is prescribed to complete the preparation.
-- Notebooks Category 7: The Intellect > Chapter 3 : The Development of Intellect > # 125