"You only find complete unanimity in a cemetary."

“All leaders are learners. The moment you stop learning, you stop leading. I learn as much as I can, from as many as I can, as often as I can.”

“Hope is not just one single quality or promise. Hope has to do with believing beyond today— knowing there’s a garden of beauty that awaits me.”

“There are, however, composers whose music can only be heard in a chromatic sense. George Perle, for example, wrote pieces that you might think of as leaning in a tonal direction but it's very hard to register a pitch as, say, the sixth degree of a scale, whereas in much of my music I think that's often relatively easy to do.”

“All true tradition usually appears revolutionary.”

“Look at that wonderful moonlight. It makes me long for the time when I can return home.”

“We are never without our technology. It surrounds us. It permeates our lives. We have powerful computers in our pockets, and we have been - you know, we are training our children from the youngest age to use social media, so it's something that comes very naturally to us.”

Source : Source: www.pbs.org

“Someone told me that each equation I included in the book would halve the sales.”

“If we are going to try to get across to the poorest people in the world that we care about their plight and we want them to join one world with the rest of us, we have got to make promises and keep promises.”

Source : "Universities under pressure to ‘divest’ from fossil fuels" by Maxim Lott, www.foxnews.com. April 29, 2015.