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  • The safest way for a state is to lay down the rule that religion is comprised solely in the exercise of charity and justice, and that the rights of rulers in sacred, no less than in secular matters, should merely have to do with actions, but that every man should think what he likes and say what he thinks.

    "Tractatus Theologico-Politicus" by Baruch Spinoza, ch. 20, 1677.