Morgan Housel on investing:

Every great investment is born from decisions that were harder than they appear to an outsider. There are so few exceptions to this. Investors have a fascination with no-brainers, obvious decisions, and easy money. The phrases should be chapter titles in a book on the ease of deluding yourself.

The “edge” is in enduring stress and putting skin in the game:

Finding above-average investments requires either being smarter than others, or willing to endure more discomfort and uncertainty than others. It’s natural to focus on the former, because the industry is full of people who are either very smart or think they are. But most edges are found in the latter, specifically because the “I’m-really-smart” edges get competed into the ground.