"Come, just as you are to worship."
It doesn't say clean up your life before you come to worship, it doesn't say stop cursing/drinking/smoking/having sex/what have you, it says come just the way you are to worship The Lord.
I forget this too many times.
Remember this in a season that is celebrated as the Birth of Christ - Worship, always. There are no prerequisites - God wants and loves you more than you could ever imagine.