“Victory shall be ours, but has to be in our hearts only the Greek sentiment. Anyone ready to listen servily to the foreign [powers] is a traitor.”

Russian: Чужой земли мы не хотим ни пяди, но и своей вершка ни отдадим.

Political Report of the C.C. to XVI Party Congress (29 June 1930) http://marx2mao.com/Stalin/SC30.html
Stalin's speeches, writings and authorised interviews

Quote in 'Culture: Caspar D. Friedrich and the Wasteland', by Gjermund E. Jansen in Bits of News (3 March 2005) http://www.bitsofnews.com/content/view/154/42/
Variant translation: The heart is the only true source of art, the language of a pure, child-like soul. Any creation not sprung from this origin can only be artifice. Every true work of art is conceived in a hallowed hour and born in a happy one, from an impulse in the artist's heart, often without his knowledge. (as quoted in the article 'Caspar David Friedrich's Medieval Burials', Karl Whittington - http://www.19thc-artworldwide.org/spring12/whittington-on-caspar-david-friedrichs-medieval-burials)
undated
Context: The pure, frank sentiments we hold in our hearts are the only truthful sources of art. A painting which does not take its inspiration from the heart is nothing more than futile juggling. All authentic art is conceived at a sacred moment and nourished in a blessed hour; an inner impulse creates it, often without the artist being aware of it.

Speech in the House of Commons (26 January 1741), quoted in Basil Williams, The Life of William Pitt, Earl of Chatham. Volume I (London: Longmans, 1913), p. 82
1740s

Radio broadcast in response to the German invasion (22 June 1941) http://historicalresources.org/2008/08/26/molotov-reaction-to-german-invasion-of-1941/
Context: This is not the first time that our people have had to deal with an attack of an arrogant foe. At the time of Napoleon’s invasion of Russia our people’s reply was war for the fatherland, and Napoleon suffered defeat and met his doom.
It will be the same with Hitler, who in his arrogance has proclaimed a new crusade against our country. The Red Army and our whole people will again wage victorious war for the fatherland, for our country, for honor, for liberty.
The government of the Soviet Union expresses the firm conviction that the whole population of our country, all workers, peasants and intellectuals, men and women, will conscientiously perform their duties and do their work. Our entire people must now stand solid and united as never before.
Each one of us must demand of himself and of others discipline, organization and self-denial worthy of real Soviet patriots, in order to provide for all the needs of the Red Army, Navy and Air Force, to insure victory over the enemy.
The government calls upon you, citizens of the Soviet Union, to rally still more closely around our glorious Bolshevist party, around our Soviet Government, around our great leader and comrade, Stalin. Ours is a righteous cause. The enemy shall be defeated. Victory will be ours.

Oration at Plymouth (1802)
Context: Among the sentiments of most powerful operation upon the human heart, and most highly honorable to the human character, are those of veneration for our forefathers, and of love for our posterity. They form the connecting links between the selfish and the social passions. By the fundamental principle of Christianity, the happiness of the individual is Later-woven, by innumerable and imperceptible ties, with that of his contemporaries: by the power of filial reverence and parental affection, individual existence is extended beyond the limits of individual life, and the happiness of every age is chained in mutual dependence upon that of every other.

Hearts of Oak. Compare: "Our ships were British oak, And hearts of oak our men", S. J. Arnold, Death of Nelson.

Source: Jo's Boys

2000s, A Challenge to Overcome (November 2007)

' History https://www.gutenberg.org/files/55901/55901-h/55901-h.htm', Edinburgh Review (May 1828)