Paul Tripp, speaking at our Pastor's Conference last week, said something that has stuck with me (and I paraphrase):
The Christian community should be the most saddest and most celebrant community of all. Saddest because of sin's presence in our lives and celebrant because we are blown away by the glorious provisions of Christ.
I think he's right on. Scripture seems to teach us this truth as well.
Blessed are those who mourn ... ~ Matt. 5:4
Rejoice in the Lord always ...~ Phil. 4:4
sorrowful, yet always rejoicing ... ~ 2 Cor. 6:10a
rejoice with those who rejoice, weep with those who weep ... ~ Rom. 12:15