"Men, in general, seem to employ their reason to justify prejudices, which they have imbibed, they can scarcely trace how, rather than to root them out. The mind must be strong that resolutely forms its own principles; for a kind of intellectual cowardice prevails which makes many men shrink from the task, or only do it by halves."
January 1, 1970
https://en.wikiquote.org/wiki/Prejudice