“In the long run, the sharpest weapon of all is a kind and gentle spirit.”

God Knows (1984)

Speech at The Twelfth Congress of the R.C.P.(B.) (19 April 1923) http://marx2mao.com/Stalin/TC23.html#s2
Stalin's speeches, writings and authorised interviews

"Magnus and Morna", in Thirty Years, Poems New and Old (1880)
Context: And all day long, so close and near,
As in a mystic dream I hear
Their gentle accents kind and dear —
The old familiar voices.
They have no sound that I can reach —
But silence sweeter is than speech;

Essays on Education quoted in The New York Times (24 February 1959).
Variant ending: The source of better ideas is freedom. The surest path to wisdom is liberal education.
Context: Books won't stay banned. They won't burn. Ideas won't go to jail. In the long run of history, the censor and the inquisitor have always lost. The only sure weapon against bad ideas is better ideas. The source of better ideas is wisdom. The surest path to wisdom is a liberal education.

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 501.

Source: Persepolis 2: The Story of a Return

Source: A Tract on Monetary Reform (1923), Ch. 3, p. 80
Context: But this long run is a misleading guide to current affairs. In the long run we are all dead. Economists set themselves too easy, too useless a task, if in tempestuous seasons they can only tell us, that when the storm is long past, the ocean is flat again.

The Case for India (1931)

St. 64
(1819)