"A lot of churches will teach you that you can sin every single day and still be a Christian," Skelly said to AL.com. "They'll teach you that no matter how much you sin, you're still saved. They'll say that all you have to do to be saved is believe, say the sinner's prayer, ask Jesus into your heart, and be baptized. We want to preach the whole message, not a half-message or a partial message."

Many of the students simply ignored Skelly and went about their business. Others emerged from the library with confused looks on their faces. But many spoke back at Skelly while he preached.

When a student having lunch in the courtyard yelled that everyone sins every day, Skelly said that he did not.

"Oh, I'm not a sinner anymore, he said. "Not anymore. No, I don't sin every day. True Christians don't sin."

"We're trying to do work, this is a college," one student said, arguing that she pays tuition to be there. "You look not great, so please find another place," she continued. Another man yelled that Skelly looked "[expletive] retarded."

"All your words are in vain," Skelly said. "All your attempts to get me to leave are in vain. I am steadfast."

Soon, counter-protests developed. Music was the tool of choice.

After a group of students made a short-lived effort to sing "Kumbaya," one man pulled out a portable speaker and proceeded to play Black Sabbath's "War Pigs" in order to drown Skelly out. He gradually moved closer to Skelly, until he, too, was standing in front of the library entrance. Skelly was not fazed.

The student with the speaker left, but later returned with a laptop computer and took a seat in front of Skelly. A group of students gathered around him and they began to sing Queen's "Bohemian Rhapsody."

As they sang, UAB Campus Police arrived with UAB Assistant Vice President of Student Life Andy Marsch. After several minutes of negotiation, Skelly agreed to move away from the library entrance, to the sidewalk by the street, eliciting cheers from the students.

Marsch told AL.com he had "more than a dozen" calls from the library to complain that Skelly was disrupting their studying. He said that while UAB is a public college, it does have the right to schedule events on its premises, and Skelly's preaching was not scheduled.

According to the Pinpoint Ministries online calendar, Skelly is scheduled to travel tomorrow to The Masters golf tournament, and next week to a Miley Cyrus concert in Nashville.

Skelly hands off his sign to someone so he can literally thump the Bible. pic.twitter.com/TYFY3QJoy4 -- Madison Underwood (@MadisonU) April 10, 2014

After Skelly mentions he is from Kentucky, a student yells "Go Louisville!" "I'm not a sports fan." pic.twitter.com/OpGfcdjkhX -- Madison Underwood (@MadisonU) April 10, 2014

Some students made a short lived effort to sing "Kum-by-yah." -- Madison Underwood (@MadisonU) April 10, 2014

The circle of a half-dozen students that was in front of Skelly has dispersed. "This is why I don't go to church," one student told me. -- Madison Underwood (@MadisonU) April 10, 2014

If nothing else, Skelly has prompted conversations about religion all around me. "I'm not very religious, but..." One girl says behind me. -- Madison Underwood (@MadisonU) April 10, 2014

The kid playing Black Sabbath has moved to about ten feet of Skelly now. pic.twitter.com/7Ou728D9Ik -- Madison Underwood (@MadisonU) April 10, 2014