How my mind works now part 1 of... no idea

Its funny how my brain works. I can spend the whole day feeling like there is no point to my existence, and generally being negative, but show me someone who feels the same or similar and I will spend hours giving them proof that they are wrong, and usually I can get them to admit im right. Here’s the thing though, these days I’ll end up proving the point to myself as well, so while I’m helping someone else I’m also helping myself, this is new. The reason for this change? I give my proof from the bible, so my proof HAS to apply to me too.
Its funny, the way my brain works has done a complete 180 at some point between a year ago and now. It used to be that I’d come out of a conversation in which I was trying to help someone and I’d be feeling worse than dirt, now I feel like I’m doing something right, like I’ve found what I’m supposed to do, and doing it makes me happy.
An example would be last night. I had had a mini break down and was feeling rather crappy. Then I started talking with a friend and found out that she was feeling a lot of negative things in relation to her relationship with God. She felt that she had gone astray and that this was far from the first time, and she felt that she had to hide her religion from others because she had a sense of being judged for it, at one point she said “I am Romeo, I have denounced my Father and renounced my name”. But the thing is she wanted to get back to God, she just felt unworthy, and that maybe she would be rejected after having rejected Him so many times. I told her that she is less of a Romeo and more like the Prodigal Son. I then went on to tell her the story and explain what it meant in relationship to her. I also addressed her feelings of being judged by others by reminding her of Luke 21:17-19, and gave her an example of myself, of how my own mother calls me ‘traitor’ for following Jesus. In the end she admitted that what I said made sense, and we both felt much better.