I decided to sell my drawings. However, I didn't want people to buy my drawings because the professor of physics isn't supposed to be able to draw - isn't that wonderful - so I made up a false name.

To love someone deeply gives you strength. Being loved by someone deeply gives you courage.

If you want a love message to be heard, it has got to be sent out. To keep a lamp burning, we have to keep putting oil in it.

The math is dead simple: it seems that the frequency of planets able to support life is roughly one percent. In other words, a billion or more such worlds exist in our galaxy alone. That's a lot of acreage, and it takes industrial-strength credulity to believe it's all bleakly barren.

Sometimes the best lighting of all is a power failure.