Do not look at stars as bright spots only. Try to take in the vastness of the universe.

I saw, in looking over Cooper, elements of a comet of 1825 which resemble what I get out for this, from my own observations, but I cannot rely upon my own.

The world of learning is so broad, and the human soul is so limited in power!

I was a little doubtful about the propriety of going to the Mammoth Cave without a gentleman escort, but if two ladies travel alone they must have the courage of men.

I had only ordinary capacity but extraordinary persistency.

I would as soon put a girl alone into a closet to meditate as give her only the society of her needle.

I made observations for three hours last night, and am almost ill today from fatigue; still I have worked all day, trying to reduce the places, and mean to work hard again tonight.