Stephen Colbert’s “The Late Show” took on a more serious tone Wednesday night when the comedian challenged his guest, Ricky Gervais, and his disbelief in God.

Colbert, who also devotes his time to being a Sunday school teacher, took on the agnostic Gervais and questioned the star’s faith in science.

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“Why is there something instead of nothing?” Colbert asked before Gervais began denying the entire proposition.

“There are about three thousand gods to choose from…You deny one less god than I do,” he replied.

“Science is constantly proved all the time. If we take any holy book and destroyed it in a thousand years time that wouldn’t come back just as it was,” Gervais continued. “Whereas, if we took every science book and destroyed them all in a thousand years they’d all be back because all the same test would be the same results.”

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“That’s really good,” Colbert answered.