There is almost nothing more painful for a leader than seeing good people leave a growing organization, whether it's a priest watching a Sunday school teacher walk out the door or a CEO saying goodbye to a co-founder.

Anybody, and any company, can have a big run of success once, but if you're going to repeat that over time, you need to be aware that you need to keep learning.

I have yet to meet members of a leadership team who I thought lacked the intelligence or the domain expertise required to be successful. I've met many, however, who failed to foster organizational health. Their companies were riddled with politics, various forms of dysfunction, and general confusion about their direction and mission.

Without trust, the most essential element of innovation - conflict - becomes impossible.

A number of former Wells Fargo employees have described their work environment characterized by intense pressure to meet aggressive and unrealistic sales goals. In a 2010 letter to shareholders, Mr. Stumpf wrote that Wells Fargo's goal was eight products per customer because eight rhymed with great.

My success is not due to any personal superiority over other people.

I think I played in Lambeau maybe 14, 15 times. I've played there a lot of times. It's in the teens, double digit. I've had success on that field, won and lost.

I dislike the phrase 'social media.' 'Social media' is merely a way to describe new tools in an old and narrow paradigm where we measure success by how many people are reached.