Dr. Ben Carson, a pediatric neurosurgeon who shocked Washington when he used his speech at the non-partisan National Prayer Breakfast to lecture President Barack Obama on the flat tax earlier this month, is defending his rant by insisting that he was just trying to "please" God.

As the president was forced to sit and listen, Carson had suggested that Biblical “tithing” would be a better system than the current progressive tax where wealthy Americans pay a higher rate than the poor.

During an interview that aired on Sunday, Fox News host Chris Wallace asked Carson if he had any regrets about upstaging the president and hijacking the non-partisan prayer breakfast.

"I serve God," Carson explained. "And my purpose is to please Him. And if God be for you, who can be against you?"

The neurosurgeon is retiring from his career as a surgeon in June and has said that a possible run for president was "up to God."

Watch this video from Fox News' Fox News Sunday, broadcast Feb. 24, 2013.