Although the works of the Creator may be in themselves all equally perfect, the animal is, as I see it, the most complete work of nature, and man is her masterpiece.

All the work of the crystallographers serves only to demonstrate that there is only variety everywhere where they suppose uniformity ... that in nature there is nothing absolute, nothing perfectly regular.

Time is the great workman of Nature.

Man thinks, and at once becomes the master of the beings that do not think.

Style supposes the reunion and the exercise of all the intellectual faculties. The style is the man.

In Ireland, there are the same fossils, the same shells and the same sea bodies, as appear in America, and some of them are found in no other part of Europe.

Hold on; hold fast; hold out. Patience is genius.