"I have established a new era in natural history."

"A natural arrangement is one which is based on all parts of the plant."

"The whole earth is a garden, and man is its gardener."

"I saw the infinite, all-knowing and all-powerful God from behind as he went away, and I grew dizzy. I followed his footsteps over nature's fields and saw everywhere an eternal wisdom and power, an ins…"

"The natural system is the highest goal of botany."