People with high levels of personal mastery...cannot afford to choose between reason and intuition, or head and heart, any more than they would choose to walk on one leg or see with one eye.

Collaboration is vital to sustain what we call profound or really deep change, because without it, organizations are just overwhelmed by the forces of the status quo.

How has the world of the child changed in the last 150 years?" The answer is. "It's hard to imagine any way in which it hasn't changed.They're immersed in all kinds of stuff that was unheard of 150 years ago, and yet if you look at schools today versus 100 years ago, they are more similar than dissimilar.

In the Machine Age, the company itself became a machine - a machine for making money.

I often say that leadership is deeply personal and inherently collective. That's a paradox that effective leaders have to embrace.

Don't push growth; remove the factors limiting growth.

The rate at which organizations learn may soon become the only sustainable source of competitive advantage.