" Foundations are key. It's much better to be at 9/10 or 10/10 on foundations than to try and get super deep into things. You do need to be deep in something because otherwise you'll be a mile wide and an inch deep and you won't get what you want out of life. You can only achieve mastery in one or two things. It's usually things you're obsessed about. "

― Eric Jorgenson , The Almanack of Naval Ravikant: A Guide to Wealth and Happiness