I do not yet know why plants come out of the land or float in streams, or creep on rocks or roll from the sea. I am entranced by the mystery of them, and absorbed by their variety and kinds. Everywhere they are visible yet everywhere occult.
“You are today where your thoughts have brought you; you will be tomorrow where your thoughts take you.”
“Finally there are simple ideas of which no definition can be given; there are also axioms or postulates, or in a word primary principles, which cannot be proved and have no need of proof.”