John Adams, letter to John Jay (June 2, 1785, quoting Adams' speech to George III):
I think myself more fortunate than all my fellow-citizens, in having the distinguished honor to be the first to stand in your Majesty's royal presence in a diplomatic character; and I shall esteem myself the happiest of men, if I can be instrumental in recommending my country more and more to your Majesty's royal benevolence, and of restoring an entire esteem, confidence, and affection, or, in better words, the old good nature and the old good humor between people, who, though separated by an ocean, and under different governments, have the same language, a similar religion, and kindred blood.
Adams' phrase "the same language, a similar religion, and kindred blood" recalls Herodotus 8.144.2 (tr. Aubrey de Sélincourt):
Again, there is the Greek nation — the common blood, the common language; the temples and religious ritual; the whole way of life we understand and share together — indeed, if Athens were to betray all this it would not be well done.
αὖτις δὲ τὸ Ἑλληνικὸν ἐὸν ὅμαιμόν τε καὶ ὁμόγλωσσον καὶ θεῶν ἱδρύματά τε κοινὰ καὶ θυσίαι ἤθεά τε ὁμότροπα, τῶν προδότας γενέσθαι Ἀθηναίους οὐκ ἂν εὖ ἔχοι.
Related post: One United People
(on John Jay and the same passage from Herodotus).