Logic is the art of non-contradictory identification. A contradiction cannot exist. No concept man forms is valid unless he integrates it without contradiction into the total sum of his knowledge. To arrive at a contradiction is to confess an error in one's thinking; to maintain a contradiction is to abdicate one's mind and to evict oneself from the realm of reality

"If you were offered the chance to live your own life again, would you seize the opportunity? The only real philosophical answer is automatically self-contradictory: 'Only if I did not know that I was doing so.' To go through the entire experience once more would be banal and Sisyphean-even if it did build muscle-whereas to wish to be young again and to have the benefit of one's learned and acquired existence is not at all to wish for a repeat performance, or a Groundhog Day. And the mind ought to, but cannot, set some limits to wish-thinking. All right, same

Oh, if only it were possible to find understanding," Joseph exclaimed. "If only there were a dogma to believe in. Everything is contradictory, everything tangential; there are no certainties anywhere. Everything can be interpreted one way and then again interpreted in the opposite sense. The whole of world history can be explained as development and progress and can also be seen as nothing but decadence and meaninglessness. Isn't there any truth? Is there no real and valid doctrine?

You're only a man! You've not our gifts! I can tell you! Why, a woman can think of a hundred different things at once, all them contradictory!

To the indefinite uncertain mind of the American radical the most contradictory ideas and methods are possible. The result is a sad chaos in the radical movement a sort of intellectual hash which has neither taste nor character.

Contradictory to my religion I think is journalism.

Doublethink means the power of holding two contradictory beliefs in one's mind simultaneously and accepting both of them.

Some people suggest that the problem is the separation of powers. If you had a parliamentary system the struggle for power would not result in such complex peace treaties that empower so many different people to pursue so many contradictory aims.

The 'morality of compromise' sounds contradictory. Compromise is usually a sign of weakness or an admission of defeat. Strong men don't compromise it is said and principles should never be compromised.

My mind withdrew its thoughts from experience extracting itself from the contradictory throng of sensuous images that it might find out what that light was wherein it was bathed... And thus with the flash of one hurried glance it attained to the vision of That Which Is.

It is a strange fact that freedom and equality the two basic ideas of democracy are to some extent contradictory. Logically considered freedom and equality are mutually exclusive just as society and the individual are mutually exclusive.

I am a contradictory mess but I see it as my prerogative to change my mood like the weather.