What does the Bible say about rejoicing in the Lord?

The Bible repeatedly emphasizes the importance of rejoicing in the Lord as a fundamental expression of faith. In Psalm 33:1-2, we see the command to rejoice not merely in our circumstances but in God Himself. Paul reiterates this in Philippians 4:4, urging believers to rejoice always. This joy stems from the recognition of our salvation through Jesus Christ, who makes us righteous through His obedience. It is a deep-seated joy that transforms our hearts and informs our actions, prompting us to live in a manner worthy of the grace we've received.