Teachers can change lives with just the right mix of chalk and challenges.

My greatest challenge has been to change the mindset of people. Mindsets play strange tricks on us. We see things the way our minds have instructed our eyes to see.

As you navigate through the rest of your life be open to collaboration. Other people and other people's ideas are often better than your own. Find a group of people who challenge and inspire you spend a lot of time with them and it will change your life.

Often times when you face such an overwhelming challenge as global climate change it can be somewhat daunting - it's kind of like trying to lose weight which I know something about.

The challenges of change are always hard. It is important that we begin to unpack those challenges that confront this nation and realize that we each have a role that requires us to change and become more responsible for shaping our own future.

When we are no longer able to change a situation - we are challenged to change ourselves.

In New York you've got Donald Trump Woody Allen a crack addict and a regular Joe and they're all on the same subway car.

I challenge you to show me where the saloon has ever helped business education church morals or anything we hold dear.

Any work that's worth doing has its challenges as well as its opportunities. That's true if you're running a business it's true if you're trying to help on a campaign.

Education must provide the opportunities for self-fulfillment it can at best provide a rich and challenging environment for the individual to explore in his own way.