Those can be used to identify specific people or things observed by the speaker, or to refer to specific things previously mentioned, known, or understood.
Those are my neighbors there.
Those are weird things.
In your example, there is a difference between "those things that are," and "the things that are." Take for example, "those things that are in that drawer are mine" and "the things that are in that drawer are mine;" I could understand that the first sentence is referring to the things that are now in the drawer, while the second sentence is referring to what the drawer contains, in every moment.