Every formula which expresses a law of nature is a hymn of praise to God.

It is sad to see a woman sacrificing the ties of the affections even to do good.

I had only ordinary capacity but extraordinary persistency.

To read a book, to think it over, and to write out notes is a useful exercise; a book which will not repay some hard thought is not worth publishing.

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.

There is something of the same pleasure in noticing the hues of the stars that there is in looking at a flower garden in autumn.

Every formula which expresses a law of nature is a hymn of praise to God.