“Some people say that without God, people would give themselves permission to do anything. [Yet] only with God, only with the view that God’s on your side, can people give themselves permission to do things that otherwise would be called satanic.”
Freedom From Religion Foundation, 21/10/2007 http://www.youtube.com/watch?v=V6WByhz44EA&t=4m25s
2000s, 2007
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Christopher Hitchens 305
British American author and journalist 1949–2011Related quotes

“And as we let our own light shine, we unconsciously give other people permission to do the same.”

This might be a paraphrase of some of Locke's expressions or ideas, but the earliest publication of the statement in this form seems to be one made in Oversight Hearing on the Columbia River Gorge National Scenic Area Act (1997).
Misattributed

Here is the sample of liberty no storms may shake. Here are the altars of freedom no factions shall destroy. It was American in conception, American in its building. It shall be American in the fulfillment. Factional once, we are all American now. And we mean to be all Americans to all the world.
1920s, The American Soldier (1920)