"Rejoice in the Lord," Paul tells the Philippians. And notice: It is an instruction, not a suggestion. Rejoicing in the Lord is not of marginal importance, nor is it an optional extra for evangelical extroverts. As the Old Testament tells us, "The joy of the Lord is your strength" (Neh. 8:10).
  Strong Christians are strong because they enjoy the Lord. People who don't enjoy him live thier lives apart from him and, accordingly, know nothing of his strength. Rejoicing in the Lord may mean thinking through how to rejoice when we don't feel like it. It may mean acting as if everything will turn out all right--when we have no guarantees we can see at the moment.
  One thing is certain. There is no way a mere human can live in this world as if he belongs to the next world without the strength of the Lord.

Prayer
Lord, I have to admit that sometimes things come my way that don't delight me, so I struggle against my circumstances. Until, that is, I turn my thoughts to you. Even thogh my situation does not change, thanks for changing my attitude and helping me to once again find my strength in you. Amen