Another I think timely quote from Howard Marks’s The Most Important Thing Illuminated:
Emphasis mine…
““The human side of investing” is the critical side. It’s certainly an area in which superior investors must excel, since financial analysis won’t guarantee superior performance if your reactions to developments are skewed by psychology just like those of others. Thus my third key theme relates to control over emotion and ego. Accomplishing this is quite difficult, since everything in the investing environment conspires to make investors do the wrong thing at the wrong time.”