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

However, everything has an end, everything passes away, even the hunger of people who have not eaten

The Great Architect of the universe built it of good firm stuff.

There are no impossible obstacles; there are just stronger and weaker wills, that’s all!

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.

Liberty is worth paying for.

I wanted to see what no one had yet observed, even if I had to pay for this curiosity with my life.