“I have learnt through bitter experience the one supreme lesson to conserve my anger, and as heat conserved is transmuted into energy, even so our anger controlled can be transmuted into a power which can move the world.”
Young India (15 September 1920), reprinted in Collected Works of Mahatma Gandhi, Vol. 21 (electronic edition), p. 252.
1920s
Help us to complete the source, original and additional information
Mahatma Gandhi 238
pre-eminent leader of Indian nationalism during British-rul… 1869–1948Related quotes

“To anger a conservative, lie to him. To anger a liberal, tell him the truth.”
First attributed to Roosevelt on the internet in recent years, there is no evidence he ever said this, as noted in "Teddy Roosevelt on Conservatives vs. Liberals", by Dan Evon at snopes.com (3 June 2016) http://www.snopes.com/teddy-roosevelt-anger-a-liberal-quote and at Teddy Roosevelt once said, “To anger a conservative, lie to him. To anger a liberal, tell him the truth.” (14 June 2016) https://www.truthorfiction.com/teddy-roosevelt-anger-conservative-lie-quote
Misattributed

"The Uses of Anger"
Sister Outsider: Essays and Speeches (1984)

2016, Remarks on Donald Trump and the 2016 race

“Shall the Fundamentalists Win?” in Christian Work #102 (10 June 1922), p. 716–722 http://historymatters.gmu.edu/d/5070/
Context: Already all of us must have heard about the people who call themselves the Fundamentalists. Their apparent intention is to drive out of the evangelical churches men and women of liberal opinions. I speak of them the more freely because there are no two denominations more affected by them than the Baptist and the Presbyterian. We should not identify the Fundamentalists with the conservatives. All Fundamentalists are conservatives, but not all conservatives are Fundamentalists. The best conservatives can often give lessons to the liberals in true liberality of spirit, but the Fundamentalist program is essentially illiberal and intolerant.

“Controls them and subdues, transmutes, bereaves
Of their bad influence, and their good receives.”
Source: Character of the Happy Warrior http://www.bartleby.com/145/ww302.html (1806), Line 17.