The catholic way of thinking

I am in a strange country, of the first thing here is the church, the catholic church, looks wonderful in its interiors, but for mye sake it is a problem to understand their language.
We are human beings, all, wear underwear, we are not different at all, what does the talking of catholics mean.
When you talk to them, you must relate, you must contemplate the essence of catholic teaching, which is to my view the same as every human being must think, forgiveness.
Then you can understand catholic dogmatics, it is just a traditional language used to contemplate forgiveness.