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"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."
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"But twice-two-makes-four is for all that a most insupportable thing. Twice-two-makes-four is, in my humble opinion, nothing but a piece of impudence. Twice-two-makes-four is a farcical, dressed-up fellow who stands across your path with arms akimbo and spits at you."
"I was upset. I had always believed logic was a universal weapon and now I realized how its validity depended on the way it was employed."
"Every why hath a wherefore."
"But all propositions of logic say the same thing. That is, nothing."
Explore more quotes by Ayn Rand
"Every man builds his world in his own image. He has the power to choose, but no power to escape the necessity of choice."
"From this simplest necessity to the highest religious abstraction, from the wheel to the skyscraper, everything we are and everything we have comes from a single attribute of man-the function of his reasoning mind."
"There is no escape from justice, nothing can be unearned and unpaid for in the universe, neither in matter nor in spirit-and if the guilty do not pay, then the innocent have to pay it."
"I can accept anything, except what seems to be the easiest for most people: the half-way, the almost, the just-about, the in-between."
"The exquisite kindliness of her manner suggested that their relationship was of no possible consequence, that she could not pay him the tribute of hostility."
"There are two sides to every issue: one side is right and the other is wrong, but the middle is always evil."
"It only stands to reason that where there's sacrifice, there's someone collecting the sacrificial offerings. Where there's service, there is someone being served. The man who speaks to you of sacrifice is speaking of slaves and masters, and intends to be the master."
"It was the only thing I ever really wanted. And that's the sin that can't be forgiven-that I hadn't done what I wanted. It feels so dirty and pointless and monstrous, as one feels about insanity, because there's no sense to it, no dignity, nothing but pain-and wasted pain...why do they always teach us that it's easy and evil to do what we want and that we need discipline to restrain ourselves? It's the hardest thing in the world-to do what we want. And it takes the greatest kind of courage."
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