Let's see...
Post 5 states, "Pride is a sin." The post, though short, does fall under the topic of "pride". Am I splitting hairs, probably so, but it's not like he started talking about his My Little Pony collection. You were talking about pride, he brought up what was probably the first thing that came to his mind on the subject. Pride is not only a sin according to religion but it is considered the sin of sins. If you look up the definition to pride many (if not most, I don't remember for sure and I'm not looking again) of the definitions aren't exactly saying it's swell to be proud.
Post 7 was in response to post 5 and post 8 was in response to post 7. This happens in conversation. Topics start to broaden into further discussion. Pride = Sin = Other Sins. If you will notice in post 11 the poster offered an apology for his part in the conversations flow moving away from the original question. Frankly, though I find this whole thread a bit tacky, I really find it tacky that you are pointing out somebody's post in a negative view after they already offered an apology.
Post 12, one of mine, is in response to one of your posts. It's addition here is obviously a mistake on your part.
Post 13 is a direct biblical quote backing up the statement from post five, still having to do with the subject of "pride".
Post 15 is an accurate if simplistic statement. Each emotion (at least the primary emotions) are believed to have an opposite emotion. It makes sense that the emotion mentioned could be considered the opposite to pride.
Post 16 is in response to post 2 in which somebody attempted to provide an answer. Quite frankly I'm proud of what that person has accomplished in regards to that statement. I cannot, however, tell you what physiologically causes that pride. There is also the fact that your response basically brushed off what this person said. Though it may not have been what you were looking for, it was an honest attempt to grow the conversation.
Post 17 also goes along with post 2 (and 3) and your response to them.