"If you have a vaccine or an antidote that people can benefit from, you're not going to want to keep it to yourself. You're going to want to spread that wisdom or whatever to as many people as you can, so everybody can benefit from it."

"I know more about what it's like to be elderly and infirm and kind of stupid, the way you get forgetful, but on the other hand I'm a littler, wiser, dare we say? The word 'wisdom' has kind of faded out of our vocabulary, but yeah, I'm a little wiser."

"We've been surrounded by images of space our whole lives, from the speculative images of science fiction to the inspirational visions of artists to the increasingly beautiful pictures made possible by complex technologies. But whilst we have an overwhelmingly vivid visual understanding of space, we have no sense of what space sounds like."

"Global security can be formed or threatened by heads of state whose wisdom, folly and obsessions shape global events. But often it is the security practitioners, those rarely in the headlines but whose craft and energy quietly break new ground, who keep us safe or put us in peril."

"Silence is not a reply. However, it shows a way of avoiding further discussion and critical questions and the escape from the reality or idiocy, since it is a personal diplomacy."

"Washington once advised his adopted grandson that where there is no occasion for expressing an opinion, it is best to be silent. For there is nothing more certain than that it is at all times more easy to make enemies than friends."