When Jesus preached the sermon on the mount, I don't remember him telling them to all go home and change clothes. But I do remember how he addressed the Pharisee's and their legalism. it wasn't pretty.

Should people show up to worship looking like they just rolled out the bed ? No. Unless that's all they know. Should we have a reverent posture when going to worship ? Of course. I don't understand why people shop at Wal - Mart in their pajamas, but I've not seen that at church. Yet.