- There are lots of people who say don't work with friends and don't mix your professional and personal. But when building a startup you're spending an inordinate amount of time with each other. It's almost like a marriage. Build with those you like and those you're close to. --- Why work with a group of people who don’t even like each other? Many seem to think it’s a sacrifice necessary for making money. - Peter Thiel in [[Zero to One]]