“Mankind must put an end to war - or war will put an end to mankind.[Address before the United Nations, September 25 1961]”

“Peace is a daily, a weekly, a monthly process, gradually changing opinions, slowly eroding old barriers, quietly building new structures. And however undramatic the pursuit of peace, that pursuit must go on.[Address before the United Nations, September 20 1963]”

“Every inhabitant of this planet must contemplate the day when this planet may no longer be habitable .. The weapons of war must be abolished before they abolish us.”

“We must face the fact that the United States is neither omnipotent nor omniscient, that we cannot impose our will upon the other 94 percent of mankind, that we cannot right every wrong or reverse every adversity, and that therefore there cannot be an American solution to every world problem.”

“If a free society cannot help the many who are poor, it cannot save the few who are rich.[Inaugural Address, January 20 1961]”

“Never before has man had such capacity to control his own environment,...We have the power to make this the best generation of mankind in the history or the world - or make it the last.”

“We choose to go to the moon in this decade and do the other things, not because they are easy, but because they are hard.[Address at Rice University, September 12 1962]”