"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…"

"I was born to be a botanist, and I have never regretted my choice."

"The first step in wisdom is to know the things themselves; this notion consists in having a true idea of the objects; objects are distinguished and known by classifying them methodically and giving th…"

"I have seen the face of God."

"The whole of natural history depends on the accurate knowledge of species."