“I'm interested in the computer as a new idea, a new and fundamental philosophical concept that changes mathematics, that solves old problems better and suggests new problems, that changes our way of thinking and helps us to understand things better, that gives us radically new insights…”

1960, The New Frontier
Context: But I think the American people expect more from us than cries of indignation and attack. The times are too grave, the challenge too urgent, and the stakes too high — to permit the customary passions of political debate. We are not here to curse the darkness, but to light the candle that can guide us through that darkness to a safe and sane future. As Winston Churchill said on taking office some twenty years ago: if we open a quarrel between the present and the past, we shall be in danger of losing the future. Today our concern must be with that future. For the world is changing. The old era is ending. The old ways will not do. [... ] It is a time, in short, for a new generation of leadership — new men to cope with new problems and new opportunities.

Soviet Russia: Some Random Sketches and Impressions (1949)

2016, Remarks to the People of Cuba (March 2016)
Context: The ideals that are the starting point for every revolution -- America’s revolution, Cuba’s revolution, the liberation movements around the world -- those ideals find their truest expression, I believe, in democracy. Not because American democracy is perfect, but precisely because we’re not. And we -- like every country -- need the space that democracy gives us to change. It gives individuals the capacity to be catalysts to think in new ways, and to reimagine how our society should be, and to make them better.

K-Linesː A Theory of Memory (1980)

Section 3 (p. 172)
Short fiction, Rumfuddle (1973)

Presidential campaign address, Miami, Florida, (September 1956), as quoted in Best Quotes of '54, '55, '56 (1957) edited by James Beasley Simpson

Teacher

Source: The Throne of Fire

Industrial Engineering, 1905