The distance between the earth and her satellite is a mere trifle, and undeserving of serious consideration. I am convinced that before twenty years are over one-half of our earth will have paid a visit to the moon.

Science, my lad, is made up of mistakes, but they are mistakes which it is useful to make, because they lead little by little to the truth.

I have always fancied that the end of the world will be when some enormous boiler, heated to three thousand millions of atmospheric pressure, shall explode and blow up the globe. ... They [the Americans] are great boilermakers.

What darkness to you is light to me

I am very bad at expressing tender sentiments. The very word 'love' frightens me.

All great actions return to God, from whom they are derived.

I say, you do have a heart!" "Sometimes," he replied, "when I have the time.