I learned two basic lessons on Everest. First, just because something has worked in the past does not mean it will work today. Second, different challenges require different mindsets.

There is nothing more powerful than the made-up mind.

If we pass on an unsustainable environment to our children we have failed them.

We need to save the Arctic not because of the polar bears, and not because it is the most beautiful place in the world, but because our very survival depends upon it.

Climate change is the Everest of all problems, the thorniest challenge facing humankind.

If you want to swim across the English Channel from England to France - you have to leave your doubt on the beach in England.

Going against the tide has never been difficult for me. It wasn't even a conscious decision but the natural consequence of following my own instinct.

The right to have our environment protected for the benefit of present and future generations is our most important human right.

The importance of music extends well beyond its performance.

The swim at Deception Island was by far the hardest swim I've ever done. Antarctica is a very unforgiving environment. If you don't train properly, you'll die.

When I'm preparing for a swim, I imagine absolutely everything about it: the color of the water, how cold it is, the taste of salt in my mouth. I visualize each and every stroke.

You need a companion for your thought process, than a physical relationship.

Wanting to live, but accepting death to save others: that was courage.

It has been said "the truth will make men free". The truth alone has never set anyone free. It is only DOUBT which will bring mental emancipation.

Almost nobody dances sober, unless they happen to be insane. H. P. LOVECRAFT, attributed, Telling It Like It Is Dancing is very important nowadays. No girl will look at you if you can't dance.

The arts have always served relationships between people of different cultures so well. In a way, the arts function as a very serious kind of ambassador.

For when two Join in the same adventure, one perceives Before the other how they ought to act; While one alone, however prompt, resolves More tardily and with a weaker will.

There were different moments where I was like, "Okay, this is who I am today." But, when I'm kept on my toes, I'm having the best time of my life.

Probably more than half of the people who go into psychology do so because they need help. I think it's their way of feeling that they have control.

It's human nature to keep doing something as long as it's pleasurable and you can succeed at it, which is why the world population continues to double every 40 years.

The most important thing for me is honesty. Just be honest and up front. I think that's the hardest.