Morality did not begin by one man saying to another, "I will not hit you if you do not hit me"; there is no trace of such a transaction. There IS a trace of both men having said, "We must not hit each other in the holy place.
We talk of wild animals but man is the only wild animal. It is man that has broken out. All other animals are tame animals; following the rugged respectability of the tribe or type.
I will go forth as a real outlaw," he said, "and as men do robbery on the highway I will do right on the highway; and it will be counted a wilder crime.
Christianity satisfies suddenly and perfectly man's ancestral instinct for being the right way up; satisfies it supremely in this, that by its creed Joy becomes something gigantic, and Sadness something special and small.