A very interesting point you've made, MrP! I didn't notice the difference until you mentioned it. And I think your analysis is valid.
So you think it's the same with 'the/some aspects of oneself'?
When it's 'tell you the/some aspects of yourself', is it something like this?
・OK. Now I tell you the/some aspects of yourself that you are not usually aware of. First, you are ...And second, you are not ...when...And when it's 'tell you the/some aspects of yourself', it goes like this?
・Now I'm going to tell you about the/some aspects of yourself that you are not usually aware of. You know you are basically...but you are not ...when...