1 Thessalonians 5:16

Rejoice always [A short time previous to Paul's letter the Thessalonian Christians had all been pagans, and as such, under similar conditions of distress and persecutions, would have been apt to seek escape from their troubles by suicide; but now they are bidden to make their sufferings for Christ a source of new joy, as Jesus had commanded (Matthew 5:10-12), and as Paul, who practiced this teaching, had so often enjoined (Romans 5:3-5; 2 Corinthians 12:10). Confidence in the good providence of God made such joy possible-- Romans 8:28];