Below I edited out [...] several sentences and paragraphs of JFK's final, undelivered speech, on November 22, 1963, which is mostly about Cold War nuclear preparedness, the space race, and fighting Soviet encroachment. You can read the entire text here.
This link between leadership and learning is not only essential at the community level. It is even more indispensable in world affairs. Ignorance and misinformation can handicap the progress of a city or a company, but they can, if allowed to prevail in foreign policy, handicap this country's security. In a world of complex and continuing problems, in a world full of frustrations and irritations, America's leadership must be guided by the lights of learning and reason -- or else those who confuse rhetoric with reality and the plausible with the possible will gain the popular ascendancy with their seemingly swift and simple solutions to every world problem.
There will always be dissident voices heard in the land, expressing opposition without alternative, finding fault but never favor, perceiving gloom on every side and seeking influence without responsibility. Those voices are inevitable.
But today other voices are heard in the land -- voices preaching doctrines wholly unrelated to reality, wholly unsuited to the sixties, doctrines which apparently assume that words will suffice without weapons, that vituperation is as good as victory and that peace is a sign of weakness. At a time when the national debt is steadily being reduced in terms of its burden on our economy, they see that debt as the single greatest threat to our security. At a time when we are steadily reducing the number of Federal employees serving every thousand citizens, they fear those supposed hordes of civil servants far more than the actual hordes of opposing armies.
We cannot expect that everyone, to use the phrase of a decade ago, will "talk sense to the American people." But we can hope that fewer people will listen to nonsense. And the notion that this Nation is headed for defeat through deficit, or that strength is but a matter of slogans, is nothing but just plain nonsense.
Our foreign aid program is not growing in size, it is, on the contrary, smaller now than in previous years. It has had its weaknesses, but we have undertaken to correct them. And the proper way of treating weaknesses is to replace them with strength, not to increase those weaknesses by emasculating essential programs. Dollar for dollar, in or out of government, there is no better form of investment in our national security than our much-abused foreign aid program. We cannot afford to lose it. We can afford to maintain it. we can surely afford, for example, to do as much for our 19 needy neighbors of Latin America as the Communist bloc is sending to the island of Cuba alone.
This effort is expensive -- but it pays its own way, for freedom and for America. [...] There is no longer any doubt about the strength and skill of American science, American industry, American education, and the American free enterprise system. In short, our nation space effort represents a great gain in, and a great resource of, our national strength -- and both Texas and Texans are contributing greatly to this strength.
Finally, it should be clear by now that a nation can be no stronger abroad than she is at home. Only an America which practices what it preaches about equal rights and social justice will be respected by those whose choice affects our future. Only an America which has fully educated its citizens is fully capable of tackling the complex problems and perceiving the hidden dangers of the world in which we live. And only an America which is growing and prospering economically can sustain the worldwide defenses of freedom, while demonstrating to all concerned the opportunities of our system and society.
We, in this country, in this generation, are -- by destiny rather than by choice -- the watchmen on the walls of world freedom. We ask, therefore, that we may be worthy of our power and responsibility, that we may exercise our strength with wisdom and restraint, and that we may achieve in our time and for all time the ancient vision of "peace on earth, good will toward men." That must always be our goal, and the righteousness of our cause must always underlie our strength. For as was written long ago: "except the Lord keep the city, the watchmen waketh but in vain."