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).
More quotes by John Locke
There cannot any one moral Rule be propos'd, whereof a Man may not justly demand a Reason.
Freedom of Nature is, to be under no other restraint but the Law of Nature.
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