Success underwater depends mostly on how you conduct yourself. Diving can be the most relaxing experience in the world. Your weight seems to disappear. Space travel will be available only to a few individuals for some time, but the oceans are available to almost everyone - now.

What we put into the atmosphere in terms of burning fuel is unprecedented.

When I arrived on the planet, there were only two billion. Wildlife was more abundant, we were less so; now the situation is reversed.

Since I began exploring the ocean in the 1950s, 90 percent of the big fish have been stripped away. Tuna, sharks, swordfish, cod, halibut, you name it, the numbers have just collapsed. Also, about half of the coral reefs are gone, globally, from where they were just a few decades ago.

Not only who am I, but who are we? And where are we going? It's the "we." It's the social connections that are special to human beings.

The oceans deserve our respect and care, but you have to know something before you can care about it.

We want to believe that we can continue doing what we've done for the past thousand years and not worry about the consequences coming back to us.