How to get past the bouncer

I saw a link to this story the other day. Got a good laugh, now you can have one too.

By now it had started to rain. The band were feeling despondent, and they realised that the owner was not going to give way. But, ever resourceful, my brother had an idea.

He began to confidently intone the Credo III:“Credo in unum Deum…”