"in and of itself" What is the difference here?

[cubezero3]

Hello, everyone.

How would you understand the following sentence in bold?

Words on -age are almost always beautiful; this is a lovely suffix in and of itself. The combination of the sonorants M and L with the breezy S sound makes assemblage a lovely word. This is the noun from the verb assemble. It has a less appealing sister, assembly, whose meaning is more restricted, referring only to an assemblage of people.

I think the in itself bit means something like in its own way/right. But I can't work out the meaning of a lovely suffix of itself.

Many thanks

Richard

[Tdol]

It means its beauty is complete and doesn't require anything more.