“I believe deeply that it's very important to the United States, to the economic health of the United States, that we maintain a strong dollar.”

"Remarks at the Cheney Stadium in Tacoma, Washington (387)" (27 September 1963) http://www.jfklibrary.org/Research/Research-Aids/Ready-Reference/JFK-Quotations.aspx
1963

1994. Attributed without source by telegraph.co.uk http://www.telegraph.co.uk/news/worldnews/northamerica/usa/6094226/Ted-Kennedy-quotes.html, 26 August 2009
Attributed

Frankfurt Book Fair speech (2003)

This I Believe (1952)
Context: I believe in —  I am proud to belong to —  the United States. Despite shortcomings, from lynchings to bad faith in high places, our nation has had the most decent and kindly internal practices and foreign policies to be found anywhere in history.
And finally, I believe in my whole race. Yellow, white, black, red, brown — in the honesty, courage, intelligence, durability … and goodness …. of the overwhelming majority of my brothers and sisters everywhere on this planet. I am proud to be a human being. I believe that we have come this far by the skin of our teeth, that we always make it just by the skin of our teeth — but that we will always make it … survive … endure. I believe that this hairless embryo with the aching, oversize brain case and the opposable thumb, this animal barely up from the apes, will endure — will endure longer than his home planet, will spread out to the other planets, to the stars, and beyond, carrying with him his honesty, his insatiable curiosity, his unlimited courage — and his noble essential decency.
This I believe with all my heart.

Source: The Nordic Theory of Everything, Chapter 8

2014, Young Southeast Asian Leaders Initiative Town Hall Speech (November 2014)
Context: I’m very proud of the United States. I believe that the United States is a force for good around the world. But I wouldn’t be a good President if I don’t listen to criticism of our policies and stay open to what other countries say about us. Sometimes I think those criticisms are unfair. Sometimes I think people like to complain about the United States because we’re doing too much. Sometimes they complain because they’re doing too little. Every problem around the world, why isn’t the United States doing something about it. Sometimes there are countries that don’t take responsibility for themselves and they want us to fix it. And then when we do try to fix it, they say why are you meddling in our affairs. Yes, it’s kind of frustrating sometimes. But the fact that we are getting these criticisms means that we’re constantly thinking, okay, is this how we should apply this policy? Are we doing the right thing when we provide aid to a country, but the country is still ruled by a small elite and maybe it’s not getting down to the people? Are we doing the right thing when we engage in training a military to become more professional, but maybe the military is still engaging in repressive activity? If we’re not open to those criticisms, then we won’t get better, we won’t improve.

As quoted in "Trump Cabinet picks: Ross and Mnunchin's exclusive interview with CNBC's 'Squawk Box'" at CNBC (30 November 2016) https://www.cnbc.com/2016/11/30/trump-cabinet-picks-ross-and-mnunchins-exclusive-interview-with-cnbc.html

Michael Bloomberg, July 22, 2009. http://www.politico.com/blogs/glennthrush/0709/Bloomberg_Thune_has_a_lot_of_nerve.html
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