“It is my firm conviction that man has nothing to gain, emotionally or otherwise, by adhering to a falsehood, regardless of how comfortable or sacred that falsehood may appear. Anyone who claims, on the one hand, that he is concerned with human welfare, and who demands, on the other hand, that man must suspend or renounce the use of his reason, is contradicting himself. There can be no knowledge of what is good for man apart from knowledge of reality and human nature, and there is no manner in which this knowledge can be acquired except through reason. To advocate irrationality is to advocate that which is destructive to human life.”

“This was his glory and his guilt-- that he let them teach him to feel guilty of his glory, to accept the part of a sacrificial animal and, in punishment for the sin of intelligence, to perish on the altars of the brutes. The tragic joke of human history is that on any of the altars men erected, it was always man whom they immolated and the animal whom they enshrined. It was always the animal's attributes, not man's, that humanity worshipped: the idol of instinct and the idol of force--the mystics and the kings-- the mystics, who longed for an irresponsible consciousness and ruled by means of the claim that their dark emotions were superior to reason, that knowledge cam in blind, causeless fits, blindly to be followed, not doubted-- the kings, who ruled by means of claws and muscles, with conquest as their method and looting as their aim, with a club or a gun as sole sanction of their power. The defenders of man's soul were concerned with his feelings, and the defenders of man's body were concerned with his stomach-- but both were united against his mind. Yet no one, not the lowest of humans, is ever able fully to renounce his brain. No one has ever believed in the irrational; what they do believe in is the unjust. Whenever a man denounces the mind, it is because his goal is of a nature the mind would not permit him to confess. When he preaches contradictions, he does so in the knowledge that someone will accept the burden of the impossible, someone will make it work for him at the price of his own suffering or life; destruction is the price of any contradiction. It is the victims who made injustice possible. It is the men of reason who made it possible for the rule of the brute to work. The despoiling of reason has been the motive of every anti-reason creed on earth. The despoiling ability has been the purpose of every creed that preached self-sacrifice.”

“Despite my firm convictions, I have been always a man who tries to face facts, and to accept the reality of life as new experience and new knowledge unfolds it. I have always kept an open mind, which is necessary to the flexibility that must go hand in hand with every form of intelligent search for truth.”

“the Qur’ān appears to be interested in three types knowledge for man. One is the knowledge of nature which has been made subservient to man, i.e., the physical sciences. The second crucial type is the knowledge of history (and geography): the Qur’ān persistently asks man to "travel on the earth" and see for himself what happened to bygone civilizations and why they rose and fell. The third is the knowledge of man himself.”

“man is free, in so far as he has the power of contradicting himself and his essential nature. Man is free even from his freedom; that is, he can surrender his humanity”

“Between falsehood and useless truth there is little difference. As gold which he cannot spend will make no man rich, so knowledge which cannot apply will make no man wise.”