Full Idea
A state ought to tolerate every principle of philosophy, nor is there any instance that a government has suffered in its political interests by such indulgence.
Gist of Idea
No government has ever suffered by being too tolerant of philosophy
Source
David Hume (Enquiry Conc Human Understanding [1748], XI.114)
Book Reference
Hume,David: 'Enquiries Conc. Human Understanding, Morals', ed/tr. Selby-Bigge/Nidditch [OUP 1975], p.147