The self-deceived person may even think he is able to console others who became victims of perfidious deception, but what insanity when someone who himself has lost the eternal wants to heal the person who is extremely sick unto death!
Robertspiere [sic], Robertspiere alone in vain raised his voice against the perfidious decree regarding superior conscripts, but his voice was muffled.jean-paul marat
You base man you, how can you look me in the face after what hath passed between us? See here, perfidious wretch, how I am forc'd to bear about the load of infamy you have laid upon me -O Macheath! thou hast robb'd me of my quiet to see thee tortur'd would give me pleasure.john gay
The most perfidious way of harming a cause consists of defending it deliberately with faulty arguments.friedrich nietzsche
As far as learning was concerned, Marx was, and still is, incomparably more advanced than I. I knew nothing at that time of political economy, I had not yet rid myself of my metaphysical observations... He called me a sentimental idealist and he was right; I called him a vain man, perfidious and crafty, and I also was right.karl marx