“The chief blessings of human nature are the three following:—TRUTH—VIRTUE—and LIBERTY.—These are, therefore, the blessings in the possession of which the interest of our country lies, and to the attainment of which our love of it ought to direct our endeavours. By the diffusion of KNOWLEDGE it must be distinguished from a country of Barbarians: by the practice of religious VIRTUE, it must be distinguished from a country of gamblers, Atheists, and libertines: and by the possession of LIBERTY, it must be distinguished from a country of slaves.”

This is also sometimes quoted as "The millions of people, armed in the holy cause of liberty".
1770s, "Give me liberty, or give me death!" (1775)
Context: They tell us, sir, that we are weak; unable to cope with so formidable an adversary. But when shall we be stronger? Will it be the next week, or the next year? Will it be when we are totally disarmed, and when a British guard shall be stationed in every house? Shall we gather strength by irresolution and inaction? Shall we acquire the means of effectual resistance by lying supinely on our backs and hugging the delusive phantom of hope, until our enemies shall have bound us hand and foot?
Sir, we are not weak if we make a proper use of those means which the God of nature hath placed in our power. Three millions of people, armed in the holy cause of Liberty, and in such a country as that which we possess, are invincible by any force which our enemy can send against us. Besides, sir, we shall not fight our battles alone. There is a just God who presides over the destinies of nations, and who will raise up friends to fight our battles for us. The battle, sir, is not to the strong alone; it is to the vigilant, the active, the brave.

Speech to the annual meeting of the British School at Athens in London (2 November 1926), quoted in Our Inheritance (London: Hodder and Stoughton, 1938), p. 205.
1926
Context: September of the year 490 B. C. was to my mind a more cardinal moment of fate for Europe than August 1914. Western civilization... was saved in its infancy at Marathon, and ten years later by Leonidas and by the men of Salamis... had it not been for that decade there would have been nothing to prevent Eastern Europe being orientalized and the ultimate fight for the hegemony of Europe would have been left to the Persians and the Carthaginians. But for the Greeks there would have been no civilization as we know it, and we should all have been dark-skinned people with long noses... England is the natural home of liberty and free institutions, and in her endeavour to secure these blessings for the world no country ought to be quicker than she in acknowledging her debt to Hellas.

Quoted on his facebook profile (in 2013)

2014, 25th Anniversary of Polish Freedom Day Speech (June 2014)
Context: It’s a wonderful story, but the story of this nation reminds us that freedom is not guaranteed. And history cautions us to never take progress for granted. On the same day 25 years ago that Poles were voting here, tanks were crushing peaceful democracy protests in Tiananmen Square on the other side of the world. The blessings of liberty must be earned and renewed by every generation -- including our own.

As quoted in A Dictionary of Thoughts: Being a Cyclopedia of Laconic Quotations from the Best Authors of the World, Both Ancient and Modern (1908) by Tryon Edwards, p. 301.

Source: A Discourse on the Love of Our Country (1789), p. 10

Independence Day speech (1828)
Context: In continental Europe, of late years, the words patriotism and patriot have been used in a more enlarged sense than it is usual here to attribute to them, or than is attached to them in Great Britain. Since the political struggles of France, Italy, Spain, and Greece, the word patriotism has been employed, throughout continental Europe, to express a love of the public good; a preference for the interests of the many to those of the few; a desire for the emancipation of the human race from the thrall of despotism, religious and of the human race from the thrall of despotism, religious and civil; in short, patriotism there is used rather to express the interest felt in the human race in general, than that felt for any country, or inhabitants of a country, in particular. And patriot, in like manner, is employed to signify a lover of human liberty and human improvement, rather than a mere lover of the country in which he lives, or the tribe to which he belongs. Used in this sense, patriotism is a virtue, and a patriot a virtuous man. With such an interpretation, a patriot is a useful member of society, capable of enlarging all minds, and bettering all hearts with which he comes in contact; a useful member of the human family, capable of establishing fundamental principles, and of merging his own interests, those of his associates, and those of his nation, in the interests of the human race. Laurels and statues are vain things, and mischievous as they are childish; but, could we imagine them of use, on such a patriot alone could they be with any reason bestowed.

Reflections on the Revolution in France (1790)
Context: There ought to be system of manners in every nation which a well-formed mind would be disposed to relish. To make us love our country, our country ought to be lovely.