Here's an amazing review of Chapter 19 of Boglehead Guide to Investing by It's just Money
We make decisions emotionally and justify them rationally.
But mastering your emotions is easier said than done. Looks fine in theory but very difficult to implement. Maybe the first step would be to watch these emotions and observe their power. But it's a long way to any freedom from these emotions!!
In theory there is no difference between theory and practice, but in practice, there is......!!!