Read: Philippians 3:1
Further, my brothers and sisters, rejoice in the Lord! Phil 3:1a
I suppose if you wanted to sum up Christianity in four words this would be the best possible phrase you could use: rejoice in the Lord. This is the mark of spiritual life, of a truly spiritual Christian. It is the distinctive sign of a victorious Christian. It is the one attitude that invariably brings peace and contentment to the heart. Therefore, it is the one thing Paul repeats over and over and over again: rejoice in the Lord. He knows he has said this many times before, and he will say it two more times before he ends this letter. But it is so important, he says, that he doesn’t mind saying it as many times as necessary, and it’s safe for them to hear it.
As we saw earlier in this letter, Paul pointed out the opposite as well. The sign of unbelief in the Christian life is always grumbling and disputing. Do all things, he says, without grumbling and questioning, because that is the sign of an unbelieving believer, who doesn’t believe what God is telling him. The mark of one who has learned to believe is rejoicing. Remember that definition of a Christian we have given from time to time: one who is completely fearless, continually cheerful, and constantly in trouble. It is the continual rejoicing in the midst of trouble that marks the Christian life.