Nature is often hidden; sometimes overcome; seldom extinguished.

I have called this principle, by which each slight variation, if useful, is preserved, by the term Natural Selection.

To appreciate the beauty of a snowflake, it is necessary to stand out in the cold.

I often think that the night is more alive and more richly colored than the day.

In wilderness is the preservation of the world.

Looking at the stars always makes me dream.