“Science is opposed to theological dogmas because science is founded on fact. To me, the universe is simply a great machine which never came into being and never will end. The human being is no exception to the natural order. Man, like the universe, is a machine. Nothing enters our minds or determines our actions which is not directly or indirectly a response to stimuli beating upon our sense organs from without. Owing to the similarity of our construction and the sameness of our environment, we respond in like manner to similar stimuli, and from the concordance of our reactions, understanding is born. In the course of ages, mechanisms of infinite complexity are developed, but what we call ‘soul’ or ‘spirit,’ is nothing more than the sum of the functionings of the body. When this functioning ceases, the ‘soul’ or the ‘spirit’ ceases likewise.I expressed these ideas long before the behaviorists, led by Pavlov in Russia and by Watson in the United States, proclaimed their new psychology. This apparently mechanistic conception is not antagonistic to an ethical conception of life.”

“We live in a system that espouses merit, equality, and a level playing field, but exalts those with wealth, power, and celebrity, however gained.”

“The only thing that guarantees an open-ended collaboration among human beings, the only thing that guarantees that this project is truly open-ended, is a willingness to have our beliefs and behaviors modified by the power of conversation.”

“What we do in every other area of our lives (other than religion), is, rather than respect somebody’s beliefs, we evaluate their reasons.”

“Religion is not about accepting twenty impossible propositions before breakfast, but about doing things that change you. It is a moral aesthetic, an ethical alchemy. If you behave in a certain way, you will be transformed. The myths and laws of religion are not true because they they conform to some metaphysical, scientific or historical reality but because they are life enhancing. They tell you how human nature functions, but you will not discover their truth unless you apply these myths and doctrines to your own life and put them into practice.”

“A man’s ethical behaviour should be based effectually on sympathy, education, and social ties and needs; no religious basis is necessary. Man would indeed be in a poor way if he had to be restrained by fear of punishment and hope of reward after death.”

“If faith is what you have to go on, if faith is the link between your beliefs and the world at large, your beliefs are very likely to be wrong. Beliefs can be right or wrong. If you believe you can fly, that belief is only true if indeed you can fly. Somebody who thinks he can fly, and is wrong about it, will eventually discover there’s a problem with his view of the world.”

“It is taboo in our society to criticize a persons religious faith… these taboos are offensive, deeply unreasonable, but worse than that, they are getting people killed. This is really my concern. My concern is that our religions, the diversity of our religious doctrines, is going to get us killed. I’m worried that our religious discourse- our religious beliefs are ultimately incompatible with civilization.”

“Just because I do not accept the teachings of the devotaries does not mean I’ve discarded a belief in right and wrong.””But the Almighty determines what is right!””Must someone, some unseen thing, declare what is right for it to be right? I believe that my own morality — which answers only to my heart — is more sure and true than the morality of those who do right only because they fear retribution.”

“We keep on being told that religion, whatever its imperfections, at least instills morality. On every side, there is conclusive evidence that the contrary is the case and that faith causes people to be more mean, more selfish, and perhaps above all, more stupid.”

“Laws and principles are not for the times when there is no temptation: they are for such moments as this, when body and soul rise in mutiny against their rigour … If at my convenience I might break them, what would be their worth?”

“We have a choice. We have two options as human beings. We have a choice between conversation and war. That’s it. Conversation and violence. And faith is a conversation stopper.”

“[…] every decent man confronted by a totalitarian regime ought to have the pluck to commit high treason.”

“When you repay evil with evil, you become evil.”