“Now, if the ignorance of nature gave birth to Gods, the knowledge of nature is calculated to destroy them.”
La Système de la nature; quoted in The Law of Reason, published by J. Thompson, p. 40.
Variant: Now, if the ignorance of nature gave birth to Gods, the knowledge of nature is calculated to destroy them.
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Baron d'Holbach 9
French-German author, philosopher, encyclopedist 1723–1789Related quotes

“Mankind may wring her secrets from nature, and use their knowledge to destroy themselves.”
Conclusion
Religion and the Rise of Capitalism (1926)

As quoted in The Golden Ratio (2002) by Mario Livio

Lecture on Bhagavad-gita, Chapter 7, verse 18; New York; http://prabhupadabooks.com/classes/bg/7/18/new_york/october/12/1966?d=1 (12 October 1966)

1770s, A Summary View of the Rights of British America (1774)
Variant: The God who gave us life gave us liberty at the same time; the hand of force may destroy, but cannot disjoin them.

“You calculated how to be uncalculating, and are natural by art!”
The Hand of Ethelberta (1876), ch. 20

Callum Coats: Water Wizard
Viktor Schauberger: Our Senseless Toil (1934)