Clayton M. Christensen

I helped start a ceramics company called CPS Technologies. We took it public in 1987 at $12 a share. Three months later, there was this horrible cliff: Black Monday. Fidelity had bought 15 percent of our stock, and their algorithm caused them to dump it all onto the market that day. We dropped from $12 to $2.

When people ask me, 'Are you happy?' I respond with, 'You've asked the wrong question.' There is a deep kind of satisfaction you get from building a company. This kind of satisfaction transcends happy, sad, hard, or easy. I seek satisfaction. I want to be positively disruptive.