“A wise man will keep his Suspicions muzzled, but he will keep them awake.”
Political, Moral, and Miscellaneous Reflections (1750), Miscellaneous Thoughts and Reflections
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George Savile, 1st Marquess of Halifax 65
English politician 1633–1695Related quotes

“A man feels impelled to do something to keep awake.”
Toronto Star, 30 November 1928, reported in [Famous Lasting Words: Great Canadian Quotations, Douglas & McIntyre, 2000, Vancouver, Columbo, John Robert, 571]

Remarks to Lord Shaftesbury at the dissolution of Parliament (July 1865), quoted in Edwin Hodder, The Life and Work of the Seventh Earl of Shaftesbury, K.G. Volume III (London: Cassell, 1886), pp. 187-188. Gladstone said in a speech (18 July) in Manchester after he had been elected for South Lancashire: "At last, my friends, I am come amongst you. And I am come - to use an expression which has of late become very famous, and which, if I judge the matter rightly, is not likely soon to be forgotten - I am come among you "unmuzzled."
1860s
As quoted in What Type Am I? : Discover Who You Really Are (1998) by Renee Baron, p. 110

Exchange in an interview between John Dickerson and James Mattis on CBS' "Face the Nation" on May 28, 2017.

“If a man makes me keep my distance, the comfort is, he keeps his at the same time.”

“A fool boasts about what little he knows. A wise man keeps quiet about what he knows and is safe.”
Flowers of Wisdom