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.
I am just learning to notice the different colors of the stars, and already begin to have a new enjoyment.
The world of learning is so broad, and the human soul is so limited in power!
I am always the better for open-air breathing, and was certainly meant for the wandering life of the Indian.
We especially need imagination in science.
The best that can be said of my life so far is that it has been industrious, and the best that can be said of me is that I have not pretended to what I was not.
Study as if you were going to live forever; live as if you were going to die tomorrow.
Do not look at stars as bright spots only. Try to take in the vastness of the universe.
We especially need imagination in science. It is not all mathematics, nor all logic, but it is somewhat beauty and poetry.
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