"Pay little attention to discouragement as possible. Plough ahead as a steamer does, rough or smooth - rain or shine. To carry your cargo and make your port is the point."

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It can hardly be pressed forcibly enough on the attention of the student of nature, that there is scarcely any natural phenomenon which can be fully and completely explained, in all its circumstances, without a union of several, perhaps of all, the sciences.

— John Herschel