They also help couples in the United States who don't have enough money to adopt kids from overseas, but want to, with matching funds.

Adoption is becoming more common in America. You were adopted. Do you and your wife also hope to adopt one day?

Schultz: If it's up to my wife [Kate], we will have a kid from every continent.? [Laughs]? She wants a multi-cultural family. Every time she goes overseas and does medical mission work, she calls me in tears and sends me a picture of some little kid she wants to stuff in her bag and bring back.?

On the new record, "What It Means to Be Loved" is a classic Mark Schultz heart-tugger about parents' love for their children. What's the story?

Schultz: One day Kate said, "I think we should think about adopting some kids with special needs who are pretty bad off and may not even live to be a couple years old." I said, "Honey, what have you been reading and why do we need to do that?" She said, "If they are on the sidelines of life and nobody's paying attention to them, I want to make sure they know what a great birthday and Christmas is. So before they get to heaven they know they were loved here on earth."

[The other part of the song came from] my wife telling me about a family, where the doctor said, "You're halfway through your pregnancy, but the tests are showing your baby may not even make it to its first birthday." There are doctors that do abortions. They don't even think about it; they just do it. So when a doctor said, "I'm ready to do that right now," the woman said, I want to give her the world. I want to hold her hand. I want to be her mom as long as I can. I want to show her what it means to be loved. (Lyrics from "What It Means to Be Loved.")

Earlier in your career you were reluctant to marry because of your rigorous travel schedule. Is that still a concern?

Schultz: It's a pretty awful situation. With her residency, she works 100 hours a week. She has a worse schedule than I do. If I had married somebody who, every time I was on the road, would call and say, "I'm so sad you're not here," and would break down and cry, it would kill me. We probably dated for eight years and never lived in the same town. So we practiced how to be married without seeing each other very well.

When you do have children, who will be the housewife?

Schultz: You're probably talking to him right now.

With the time you spend dwelling on these stories to fully express them in song, do you ever find yourself emotionally exhausted?

Schultz: When I hear the stories behind [songs] and then listen to [the songs], I feel the opposite of drained. I start thinking about the story behind "He Is" and go, "I want to live like a Payton Cram—an 11-year-old that has cancer and says, 'I'm moving on to the next thing, but I don't blame God.'" I want to live like somebody who says, "We had a baby on Friday, I find out I have cancer on Sunday, but we can't praise God on Friday and curse him on Sunday."

There's something so against the grain about that. Normally your first instinct is to be mad, to be scared, and to doubt. To see people do the opposite in the face of their trials gives me so much energy and hope. It makes me want to be a better person.

So, what is the story behind "He Is"?

Schultz: My wife had delivered a missionary family's baby on a Friday. Sunday came along and the mom wasn't recovering well from the delivery. They did a test and found out she had cancer. My wife had to tell them. They said, "We can't praise God on Friday and curse him on Sunday. Our circumstances may change but God doesn't." That started me thinking about this idea that "He Is. He Was. He Always Will Be."