The same mentality that leads to environmental despoliation, environmental destruction, also leads to damage to people.

What to do about climate change is political, it's social, and it's moral, which is one of the reasons the scientific community reached out to the Pope, to ask for his involvement in this issue.

It really is a very radical call ... to reject materialism as our central value and to think about the sanctity of life and what that really means if we take it seriously.

Scientists should continue doing what they've always done, which is to understand the Earth as well as they can.

We don't survive without plants and animals because we rely on them, we rely on plants to put oxygen into the atmosphere, we rely on ... fish and crops and cows to eat.

When we damage the environment, we damage everything we depend on.

Most people have thought of ... climate change as a problem about the environment that is separate and distinct from problems of human wellbeing.

Yet again, unscientific claims were being circulated broadly, but the scientists' refutation of them was published where only fellow scientists would see it.

Scientists are scientists. They're not really in a position to speak clearly on the moral dimensions, and they're not really comfortable doing that.

Scientific monitoring is going to be terrifically important, because whatever steps we take ... we will have to monitor those steps in order to know if they're actually working.

I think Pope Francis is our Pope Francis. I mean, the point of him is that he's a global leader, and he's trying, I think he's embracing that role.

People will treat you unkindly at times. Forgive them always.

What's the difference between depression and South America?If you really had to, you could conquer South America.

Every human being is, by definition, a theologian.

Do not worship me, I am not God. I'm only a man. I worship Jesus Christ.

My Irish derivation has nothing to do with me. Why should it?

Peace is not achieved by controlling nations, but mastering our thoughts.

Sincerity is like traveling on a plain, beaten road, which commonly brings a man sooner to his journey's end than by-ways, in which men often lose themselves.

Thinking is not the ability to manipulate language; it’s the ability to manipulate concepts.

The sick person is able to sense more than other people notice.

There isn't a flight goes by when I don't stare out of the window and thank my stars for what I'm seeing and feeling.