However, there is another question, which Madam How seems inclined to answer just now, which is almost as deep and mysterious.
What?
_How_ all these different kinds of things became different.
Oh, do tell me! Not I.

You must begin at the beginning, before you can end at the end, or even make one step towards the end.
What do you mean?
You must learn the differences between things, before you can find out how those differences came about.

You must learn Madam How's alphabet before you can read her book.

And Madam How's alphabet of animals and plants is, Species, Kinds of things.

You must see which are like, and which unlike; what they are like in, and what they are unlike in.