Theological religion is the source of all imaginable follies and disturbances. It is the parent of fanaticism and civil discord; it is the enemy of mankind.
There are barbarians who seize this dog, who so prodigiously surpasses man in friendship, and nail him down to a table, and dissect him alive to show you the mezaraic veins... Answer me, Machinist, has Nature really arranged all the springs of feeling in this animal to the end that he might not feel? Has he nerves that he may be incapable of suffering?
There's scarce a point whereon mankind agree - So well as in their boast of killing me; I boast of nothing, but when I've a mind - I think I can be even with mankind
What can you say to a man who tells you he prefers obeying God rather than men, and that as a result he's certain he'll go to heaven if he cuts your throat?
What is toleration? It is the prerogative of humanity. We are all steeped in weaknesses and errors: Let us forgive one another's follies, it is the first law of nature.
Before receiving your instruction, I must tell you what happened to me one day. I had just had a closet built at the end of my garden. I heard a mole arguing with a cockchafer; 'Here's a fine structure,' said the mole, 'it must have been a very powerful mole who did this work.' 'You're joking,' said the cockchafer; 'it's a cockchafer full of genius who is the architect of this building.' From that moment I resolved never to argue.
The supposed right of intolerance is absurd and barbaric. It is the right of the tiger; nay, it is far worse, for tigers do but tear in order to have food, while we rend each other for paragraphs.