"Is there anything science should not try to explain? Science is knowledge and knowledge is power - power to do good or evil. Sometimes ignorance is bliss."

"Clearly, some creative thinking is badly needed if humans are to have a future beyond Earth. Returning to the Moon may be worthy and attainable, but it fails to capture the public's imagination. What does get people excited is the prospect of a mission to Mars."

"Imagine a civilisation that's way in advance of us wants to communicate with us, and assist us in our development. The information we provide to them must reflect our highest aspirations and ideals, and not just be some crazy person's bizarre politics or religion."

"Man-made computers are limited in their performance by finite processing speed and memory. So, too, the cosmic computer is limited in power by its age and the finite speed of light."

"We have the incredible privilege of serving in the highest offices in the state. We must prove ourselves worthy of our fellow citizens' faith. We must be trusted to always place the public's good above our own and to always choose fairness over favoritism."

"If God had wanted me otherwise, He would have created me otherwise."

"Pray as though everything depended on God. Work as though everything depended on you."

"Faith in God's revelation has nothing to do with an ideology which glorifies the status quo."