"Nature does not make leaps."

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

"The more I study nature, the more I am amazed at the Creator."

"Natura non facit saltus. (Nature makes no leaps.)"

"A worm is a worm, and a man is a man. But if you compare a man to a worm, you will see that a man is only a worm."