“We can move a mountain from one place to another with our bare hands and a few shovels. It is only a matter of putting in the effort and the time. But we can speed things up by using dynamites and heavy machinery. As technology continues to accelerate, nothing is impossible.”

Speech on the Assassination of Martin Luther King, Jr. (1968)
Context: Martin Luther King dedicated his life to love and to justice between fellow human beings. He died in the cause of that effort. In this difficult day, in this difficult time for the United States, it's perhaps well to ask what kind of a nation we are and what direction we want to move in. For those of you who are black -- considering the evidence evidently is that there were white people who were responsible -- you can be filled with bitterness, and with hatred, and a desire for revenge. We can move in that direction as a country, in greater polarization -- black people amongst blacks, and white amongst whites, filled with hatred toward one another. Or we can make an effort, as Martin Luther King did, to understand, and to comprehend, and replace that violence, that stain of bloodshed that has spread across our land, with an effort to understand, compassion, and love. [... ] But we have to make an effort in the United States. We have to make an effort to understand, to get beyond, or go beyond these rather difficult times.

"The Singularity," The New Humanists: Science at the Edge (2003)

Source: The Cave (2000), p. 115 (Vintage 2003)

Source: The Diary of Frida Kahlo: An Intimate Self-Portrait

Source: Zimbabwe: Gender Equality A Right (2010)

[citation needed]
Others

1963, Limited Nuclear Test Ban Treaty speech

Source: Kafka on the Shore (2002), Chapter 12
Context: Most things are forgotten over time. Even the war itself, the life-and-death struggle people went through, is now like something from the distant past. We're so caught up in our everyday lives that events of the past, like ancient stars that have burned out, are no longer in orbit around our minds. There are just too many things we have to think about every day, too many new things we have to learn. New styles, new information, new technology, new terminology... But still, no matter how much time passes, no matter what takes place in the interim, there are some things we can never assign to oblivion, memories we can never rub away. They remain with us forever, like a touchstone. And for me, what happened in the woods that day is one of these.