Finally, and most personally, successful learners work hard not to be loners. These days, the most powerful insights often come from the most unexpected places — the hidden genius locked inside your company, the collective genius of customers, suppliers, and other smart people who would be eager to teach you what they know if you simply asked for their insights. But tapping this learning resource requires a new leadership mindset — enough ambition to address tough problems, enough humility to be willing to learn from everyone you encounter. Nobody alone learns as quickly as everybody together.

Tim put it so very well.