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

As one sits here in summertime and listens to the cuckoo and all the other bird songs, the crackling and buzzing of insects, as one gazes at the shining colors of flowers, doth one become dumbstruck before the Kingdom of the Creator.

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

The names of the plants ought to be stable [certa], consequently they should be given to stable genera.

In natural science the principles of truth ought to be confirmed by observation.

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

Yet man does recognise himself [as an animal]. But I ask you and the whole world for a generic differentia between man and ape which conforms to the principles of natural history, I certainly know of none... If I were to call man ape or vice versa, I should bring down all the theologians on my head. But perhaps I should still do it according to the rules of science.