What does the Bible say about trembling and rejoicing?

In Habakkuk 3:16-19, we see the prophet's journey from trembling to rejoicing. He begins with fear and anxiety at the words of God, recognizing the dire circumstances around him, where no fruit grows and provisions are cut off. However, despite these earthly struggles, Habakkuk resolves to rejoice in the Lord, affirming that God is his strength. This reflects a fundamental truth found throughout Scripture: that while we may experience fear and trembling in life, our ultimate assurance and joy are rooted in the unchanging character of God and His faithfulness toward His people. Just as Paul urged in Philippians 4:4, we are called to rejoice always, telling us that true joy is possible even amid trials.