Genius detects through the fly, through the caterpillar, through the grub, through the egg, the constant individual; through countless individuals the fixed species; through many species the genus; through all genera the steadfast type; through all the kingdoms of organized life the eternal unity. Nature is a mutable cloud which is always and never the same.

Four snakes gliding up and down a hollow for no purpose that I could see - not to eat, not for love, but only gliding.

He presents me with what is always an acceptable gift who brings me news of a great thought before unknown. He enriches me without impoverishing himself.

Labor is God's education.

The measure of mental health is the disposition to find good everywhere.

Let no one honour me with tears, or bury me with lamentation. Why? Because I fly hither and thither, living in the mouths of me.

Our life is an apprenticeship to the truth that around every circle another can be drawn; that there is no end in nature, but every end is a beginning, and under every deep a lower deep opens.