The ultimate truth is penultimately always a falsehood. He who will be proved right in the end appears to be wrong and harmful before it.
Arthur KoestlerLearn from the mistakes of others. You can't live long enough to make them all yourself. Boredom sets into boring minds. The more original a discovery, the more obvious it seems afterwards.
Arthur KoestlerOf all forms of mental activity, the most difficult to induce even in the minds of the young, who may be presumed not to have lost their flexibility, is the art of handling the same bundle of data as before, but placing them in a new system of relations with one another by giving them a different framework, all of which virtually means putting on a different kind of thinking-cap for the moment. It is easy to teach anybody a new fact...but it needs light from heaven above to enable a teacher to break the old framework in which the student is accustomed to seeing.
Arthur KoestlerIf one looks with a cold eye at the mess man has made of his history, it is difficult to avoid the conclusion that he has been afflicted by some built-in mental disorder which drives him towards self-destruction. Murder within the species on an individual or collective scale is a phenomenon unknown in the whole animal kingdom, except for man, and a few varieties of ants and rats.
Arthur Koestler