Why is it that countries which we call strong are so powerful in creating wars but are so weak in bringing peace? Why is it that giving guns is so easy but giving books is so hard? Why is it, why is it that making tanks is so easy, but building schools is so hard?

The first principle is that you must not fool yourself—and you are the easiest person to fool. So you have to be very careful about that. After you've not fooled yourself, it's easy not to fool other scientists. You just have to be honest in a conventional way after that.

Tear down walls of ignorance and narrow-mindedness, for nothing has to stay as it is.

Taking action means saying 'no' to indifference. If there is a war to be waged, it is the war against the indifference which is eating away at our societies.

Courage is more exhilarating than fear and in the long run it is easier. We do not have to become heroes overnight. Just a step at time, meeting each thing that comes up, seeing it is not as dreadful as it appeared, discovering we have the strength to stare it down.

Tolerance ought only to be a preliminary step which allows us to get to know other people, and which prevents us from setting up bars, just because they may be of a different race or religion. The real value of any relationship is the fact that we learn to like people in spite of our differences.

Our trouble is that we do not demand enough of the people who represent us. We are responsible for their activities… we must spur them to more imagination and enterprise in making a push into the unknown; we must make clear that we intend to have responsible and courageous leadership.