Various; earliest source The Use of Force in International Affairs http://www.worldcat.org/oclc/21414360 (Philadelphia: Friends Peace Committee, 1961), 6, and popularized by various users in the 1960s:
If what your country is doing seems to you practically and morally wrong, is dissent the highest form of patriotism?
Dissent is the highest form of patriotism http://wiki.monticello.org/mediawiki/index.php/Dissent_is_the_highest_form_of_patriotism_(Quotation), Thomas Jefferson Encyclopedia
Other form by historian Howard Zinn Dissent In Pursuit Of Equality, Life, Liberty And Happiness: An Interview With Historian Howard Zinn http://www.tompaine.com/Archive/scontent/5908.html by Sharon Basco, TomPaine.com http://TomPaine.com, July 03 2002 (The quote can be found in the first sentence of Mr. Zinn's first answer; nowhere in that article does Howard Zinn attribute that quote to Jefferson.):
While some people think that dissent is unpatriotic, I would argue that dissent is the highest form of patriotism.
Law professor Jim Lindgren of The Volokh Conspiracy has traced the possible origin of this saying back as far as the 11 November 1984 obituary of pacifist activist Dorothy Hewitt Hutchinson in the Philadelphia Inquirer, quoting a 1965 interview. The direct quote there is: "Dissent from public policy can be the highest form of patriotism," she said in an interview in 1965. "I don't think democracy can survive without it, even though you may be crucified by it at times." According to the professor's research http://volokh.com/posts/1146554363.shtml, the misattribution was popularized in the 1990's by ACLU president Nadine Strossen. Bill Mullins of the American Dialect Society did further research http://listserv.linguistlist.org/cgi-bin/wa?A2=ind0605A&L=ADS-L&P=R1297&I=-3.
Misattributed
"Family Values," The Worst Years of Our Lives: Irreverent Notes from a Decade of Greed (1991)
“To oppose corruption in government is the highest obligation of patriotism.”
“I heard that Commentary and Dissent had merged and formed Dysentery.”
Annie Hall (1977)
Source: The Sword or the Cross, Which Should be the Weapon of the Christian Militant? (1921), Ch.6 p. 107
Context: The Christian militant is challenged to follow his convictions and to refuse all compromise with means and weapons that are unchristian. If he believes firmly that war is always an unchristian way of seeking to achieve a righteous end, he should be loyal to that conviction in the face of any pressure or danger, and be no less courageous than the soldier in battle. He should be loyal to his conviction even in the face of aroused public opinion and popular clamor. He should refuse to be swayed by frenzied passion or surface patriotism, but should remember that the truest patriotism is shown only by loyalty to one's highest moral convictions.
Vol. 3, Ch. XV, The Americans
Essays: Scientific, Political, and Speculative (1891)
“Play is the highest form of research.”
Variant: Imagination is the highest form of research.
“Puns are the highest form of literature.”
Dick Cavett Show (8 June 1972).
“Art is the highest form of hope.”
in text for catalogue of documenta 7, Kassel, 1982; as cited on collected quotes on the website of Gerhard Richter: 'on Art' https://www.gerhard-richter.com/en/quotes/art-1
1980's
“Research is the highest form of adoration”
