The detail that helps you illustrate the idea? is that the only question? I can answer that is there anything else you need me to answer in the paragraph?
The most important rule of survival Brian learned in Chapter 8 was that "feeling sorry for yourself didn't work..It wasn't just that it was wrong to do, or that it was considered incorrect. It was more than that - it didn't work".
The best way to do so is by stating your claim, and use evidence to support it. If there is no evidence to support your claim, it is simply just an opinion and people will have no reason to think you are right.
Hope this helped, have a good day :)