Why do People Change Their Minds? “How quick come the reasons for approving what we like!” – Jane Austen. Understanding why people change their minds is essential to leadership. Why do we decide to devote our lives to one thing or another for example? People don’t sit down and make a rational analysis of all the possible things that they could do with their lives. Rather, their eyes light on some particular course of action that caches their attention, and then the reasons why that course makes sense come quickly.