You can't love what you don't know much about. You can't convince, stimulate, hold the attention, teach, if you don't know what you're talking about.

Climb the mountain not to plant your flag, but to embrace the challenge, enjoy the air and behold the view. Climb it so you can see the world, not so the world can see you.

To me history ought to be a source of pleasure. It isn't just part of our civic responsibility. To me it's an enlargement of the experience of being alive, just the way literature or art or music is.

Climb the mountain so you can see the world, not so the world can see you.

Never assume that people in positions of responsibility are behaving responsibly.

Real success is finding your lifework in the work that you love.

And read… read all the time… read as a matter of principle, as a matter of self-respect. Read as a nourishing staple of life.

History is a guide to navigation in perilous times. History is who we are and why we are the way we are.

Books can change your life. Some of the most influential people in our lives are characters we meet in books.

My wife, the star I steer by.

Courage is contagious. If a leader shows courage, others get the idea.

Never worry if you’re excluded from the circle, sometimes it’s full of squares.

Let your dreams outgrow the shoes of your expectations.

My mom was an environmental activist in Australia in the late '60s and '70s, and I guess I've inherited that awareness from her.

A speculator is a man who observes the future, and acts before it occurs.

Somewhere inside me there’ll always be the person I am to-night

Yoga has allowed me to bring my complete spirit together, which allows me to do less, which is more.

I'd like to get more bit-acting roles. I don't know if my talent would allow for a long dialogue, but I could definitely knock out three lines.

The history of science is science itself; the history of the individual, the individual.

Madame de Stael talks herself into a beauty.

Regardless of how it goes down, life goes on.