Savages!' he echoed, ironically. 'You set foot on one of the shores of this globe, professor, and you’re surprised to find savages? Where aren’t there savages? Besides, are they any worse than others, these whom you call savages?

In spite of the opinions of certain narrow-minded people who would shut up the human race upon this globe, we shall one day travel to the Moon, the planets, and the stars with the same facility, rapidity and certainty as we now make the ocean voyage from Liverpool to New York.

What one man can think, another man can do.

Why lower oneself to taking pride from being American or British, when you can boast of being man!

Science, my lad, has been built upon many errors; but they are errors which it was good to fall into, for they led to the truth.

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.

Anything capable of being imagined will one day be made reality.