The greater our knowledge increases the more our ignorance unfolds.

The great revolution in the history of man, past, present and future, is the revolution of those determined to be free.

No government or social system is so evil that its people must be considered as lacking in virtue.

America has tossed its cap over the wall of space.

A revolution is coming – a revolution which will be peaceful if we are wise enough; compassionate if we care enough; successful if we are fortunate enough – but a revolution which is coming whether we will it or not. We can affect its character; we cannot alter its inevitability.

Freedom is indivisible, and when one man is enslaved, all are not free. When all are free, then we can look forward to that day when this city will be joined as one and this country and this great Continent of Europe in a peaceful and hopeful globe. When that day finally comes, as it will, the people of West Berlin can take sober satisfaction in the fact that they were in the front lines for almost two decades. All free men, wherever they may live, are citizens of Berlin, and, therefore, as a free man, I take pride in the words Ich bin ein Berliner.

Forbidden fruit tastes sweet, but its aftertaste is bitter.