Fear kills joy. Trust feeds it. At the end of the first main block of material in Isaiah (chapters 1-12), the prophet describes God’s salvation (“God is my salvation,” v. 2 ESV), by means of a figure of fountains of water.
Joyfully you will draw water from the springs of deliverance.
Isaiah 12:3 NET
In this chapter of only six verses, the hymn of gratitude pours out the feelings of the people for their salvation.
The Christian remembers that he who thirsted on the cross brought to the world the living waters.
Father, I will not be afraid, but I will trust in your promise, and rejoice in the salvation we have in Christ. Amen.