Mathematics should be mixed not only with physics but with ethics.

The universe is wider than our views of it.

In the summer we lay up a stock of experiences for the winter, as the squirrel of nuts?something for conversation in winter evenings.

Linnæus, setting out for Lapland, surveys his "comb" and "spare shirt," "leathern breeches" and "gauze cap to keep off gnats," with as much complacency as Bonaparte a park of artillery for the Russian campaign. The quiet bravery of the man is admirable.

The natural historian is not a fisherman who prays for cloudy days and good luck merely; but as fishing has been styled "a contemplative man's recreation," introducing him profitably to woods and water, so the fruit of the naturalist's observations is not in new genera or species, but in new contemplations still, and science is only a more contemplative man's recreation.

There is a slumbering subterranean fire in nature which never goes out, and which no cold can chill.

The incessant anxiety and strain of some is a well-nigh incurable form of disease. We are made to exaggerate the importance of what we do; and yet how much is not done by us!