I'm a pastor and not so much a student of business as I am a student of leadership. Good to great spoke into my vocation in so many ways. It challenged me to achieve Level 5 Leadership through drive and humility. It taught me to dig in hard and not waste momentum. It taught tough lessons that I really didn't want to learn, too. Collins' "First Who, Then What" principle taught me that great leaders will put themselves through tough days by getting the right people in the right positions and dismissing the wrong people. Honestly, as I've practiced this, those days have been my toughest, but have also been the days I felt I was a wise leader. It's also spurred our church to ask ourselves what are the few things we want to do great. Keeping our organization simple is sometimes difficult and sometimes hurts people's feelings, but has made us a stronger, healthier church. I would recommend Good to Great to any leader in any line of work!