We are invited to rejoice always, we are reminded that the works of Christmas focus on the joyful witnessing to Christ, the Saviour of the world, the Lamb of God who takes away our sins.
Be happy at all time; pray constantly; and for all things give thanks to God, because this is what God expects you to do in Christ Jesus.
I learnt a song in the Philippines. It went like this; in everything give thanks, in everything give thanks, for this is the will of God in Christ Jesus for you and me. It is a great thing to learn to sing a song to help you over a hurdle in life.