"A plant is a living being, but it cannot feel."

"I saw a monster today: a two-headed calf. It lived for only an hour, but I dissected it to see if God had given it two souls."

"I consider it the greatest achievement to be a good observer."

"The classes are for the genera, the genera for the species, the species for the individuals."

"The plant kingdom covers the entire earth, offering our senses great pleasure and the delights of summer."