From Orthodoxy:
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.” They gained their morality by guarding their religion. They did not cultivate courage. They fought for the shrine, and found they had become courageous. They did not cultivate cleanliness. They purified themselves for the altar, and found they were clean.
Advertisement
I am a part-time local pastor serving 
The doctrine of original sin is surely more humbling to man than the opposite: And I know not what honour we can pay to God, if we think man came out of His hands in the condition wherein he is now.
[...] Chesterton, The Beginning of Morality 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.” They gained their morality by guarding their religion. They did not cultivate courage. They fought for the shrine, and found they had become courageous. They did not cultivate cleanliness. They purified themselves for the altar, and found they were clean. (ht) [...]