"Unless science is controlled by a greater moral force, it will become the Antichrist prophesied by the early Christians."

"Success is not measured by what a man accomplishes, but by the opposition he has encountered and the courage with which he has maintained the struggle against overwhelming odds."

"I have flown over oceans and continents, and I have seen the beauty of the world. But the greatest beauty of all is in the human spirit."

"I have always been a loner. I prefer to be by myself, where I can think and dream."

"Life is like a landscape. You live in the midst of it but can describe it only from the vantage point of distance."