“I think part of it is just the blinding optimism that you have to have as a founder and entrepreneur to believe that things are going to work out and that both of you are a good fit to be co-founders. We worked together quite a bit at McKinsey, so I think we had some familiarity with working with each other. We spoke to a lot of friends and friends of friends who are founders a bit further along on the journey to get a sense of what it's like, the discussions we need to have as co-founders before we get into it. There was a lot of hand-wringing and soul-searching before we both took the plunge.”