If you are distressed by anything external, the pain is not due to the thing itself, but to your estimate of it.

Ultimately, we have just one moral duty: to reclaim large areas of peace in ourselves.

What counts is not the things that happen, but what we do with them.

Once you realize that you can do something, it would be difficult to live with yourself if you didn’t do it.

Progress is not possible without deviation.

Science is organized knowledge. Wisdom is organized life.

Optimism is a happiness magnet.

We turn not older with years, but newer every day.

Life loves to be taken by the lapel and told: "I'm with you kid. Let's go."

Travel is the traveler. What we see isn't what we see but what we are.

The only thing we can do is honestly learn from our falls.

I believe that the privilege of a lifetime is being who you are.