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

It seemed natural; natural to the moment’s peculiar reality that was sharply clear, but cut off from everything, immediate, but disconnected, like a bright island in a wall of fog, the heightened, unquestioning reality one feels when one is drunk.

Reality is that which exists; the unreal does not exist; the unreal is merely that negation of existence which is the content of a human consciousness when it attempts to abandon reason. Truth is the recognition of reality; reason, man’s only means of knowledge, is his only standard of truth.

There is no conflict, and no call for sacrifice, and no man is a threat to the aims of another—if men understand that reality is an absolute not to be faked, that lies do not work, that the unearned cannot be had, that the undeserved cannot be given, that the destruction of a value which is, will not bring value to that which isn’t.

It was as if a volcano were cracking open, yet the people at the foot of the mountain ignored the sudden fissures, the black fumes, the boiling trickles, and went on believing that their only danger was to acknowledge the reality of these signs.

When one turns from reason to faith, when one rejects the absolutism of reality, one undercuts the absolutism of one's consciousness - and one's mind becomes an organ one cannot trust any longer. It becomes what the mystics claim it to be: a tool of distortion.

Non-thinking is an act of annihilation, a wish to negate existence, an attempt to wipe out reality. But existence exists; reality is not to be wiped out, it will merely wipe out the wiper

But a few understand that building is a great symbol we live in our minds, and existence is the attempt to bring that life into physical reality, to state it in gesture and form. For the man who understands this, a house he owns is a statement of his life.

Rationalization is a cover-up, a process of providing one's emotions with a false identity, of giving them spurious explanations and justifications - in order to hide one's motives, not just from others, but primarily from oneself. The price of rationalizing is the hampering, the distortion, and, ultimately, the destruction of one's cognitive faculty. Rationalization is a process not of perceiving reality, but of attempting to make reality fit one's emotions.