You are beginning to do that with your collection of butterflies.

You like to arrange them, and those that are most like nearest to each other, and to compare them.

You must do that with thousands of different kinds of things before you can read one page of Madam How's Natural History Book rightly.
But it will take so much time and so much trouble.
God grant that you may not spend more time on worse matters, and take more trouble over things which will profit you far less.

But so it must be, willy-nilly.

You must learn the alphabet if you mean to read.