"Try to make sense of what you see and wonder about what makes the universe exist. Be curious, and however difficult life may seem, there is always something you can do and succeed at."

"The greatest achievement of mankind is to understand the universe."

"I have noticed that even people who claim that everything is predetermined and that we can do nothing to change it, look before they cross the road."

"In the proof stage, I nearly cut that last sentence of the book. Had I done so, the sales might have been halved."

"Of course it is possible that UFO's really do contain aliens as many people believe, and the government is hushing it up."