To live by medicine is to live horribly.

We admit as many genera as there are different groups of natural species of which the fructification has the same structure.

It is the genus that gives the characters, and not the characters that make the genus.

Nature's economy shall be the base for our own, for it is immutable, but ours is secondary. An economist without knowledge of nature is therefore like a physicist without knowledge of mathematics.

Nomenclature, the other foundation of botany, should provide the names as soon as the classification is made... If the names are unknown knowledge of the things also perishes... For a single genus, a single name.

It is not God, but people themselves who shorten their lives by not keeping physically fit.

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 them appropriate names. Therefore, classification and name-giving will be the foundation of our science.