“Any astronaut can tell you you've got to do everything you can to learn about your life support system and then do everything you can to take care of it.”

“Just as we have the power to harm the ocean, we have the power to put in place policies and modify our own behavior in ways that would be an insurance policy for the future of the sea, for the creatures there, and for us, protecting special critical areas in the ocean.”

“Humans are the only creatures with the ability to dive deep in the sea, fly high in the sky, send instant messages around the globe, reflect on the past, assess the present and imagine the future.”

“Every time I slip into the ocean, it's like going home.”

“For humans, the Arctic is a harshly inhospitable place, but the conditions there are precisely what polar bears require to survive - and thrive. 'Harsh' to us is 'home' for them. Take away the ice and snow, increase the temperature by even a little, and the realm that makes their lives possible literally melts away.”

“No water, no life. No blue, no green.”

“I love my Force Fins, which are the kind of fins Special Forces use and really are adapted from the fins of fish. They're very efficient. They are so beautiful, a pair is in the Museum of Modern Art. The set I have are ruby red. I call them my ruby flippers.”

“Why is it that scuba divers and surfers are some of the strongest advocates of ocean conservation? Because they've spent time in and around the ocean, and they've personally seen the beauty, the fragility, and even the degradation of our planet's blue heart.”

“Health to the ocean means health for us.”

“Earth as an ecosystem stands out in the all of the universe. There's no place that we know about that can support life as we know it, not even our sister planet, Mars, where we might set up housekeeping someday, but at great effort and trouble we have to recreate the things we take for granted here.”

“Since the middle of the 20th century, more has been learnt about the ocean than during all preceding human history; at the same time, more has been lost.”