Teaching I realized took up a lot of my time. I was a kind of a teacher that spent time with students, spoke to them after class, tried to help them out. I'd talk with them personally about their work and try to get out of them what they were thinking about, forcing them to thinking seriously and not just falling back on all the ideas that they had picked up someplace. And so I took my job teaching very seriously and that - as a result, it took up a lot of time.