The themes reflected are: importance of money, appeareance versus reality and deceit.
I may tell you that there is something that is called, in business, quarterly interest, and another thing called payment in installments, and it is always so dreadfully difficult to manage them (importance of money).
I couldn't let my children be shabbily dressed (appeareance vs reality).
I can tell you, too, that this affair has caused me a lot of worry (deceit).