When you pass through the waters,Isaiah 43:2 NIV
I will be with you;
and when you pass through the rivers,
they will not sweep over you.
When you walk through the fire,
you will not be burned;
the flames will not set you ablaze.
God’s favour and good-will to his people speak abundant comfort to all believers. The new creature, wherever it is, is of God’s forming. All who are redeemed with the blood of his Son, he has set apart for himself. Those that have God for them need not fear who or what can be against them. What are Egypt and Ethiopia, all their lives and treasures, compared with the blood of Christ? True believers are precious in God’s sight, his delight is in them, above any people. Though they went as through fire and water, yet, while they had God with them, they need fear no evil; they should be born up, and brought out. The faithful are encouraged. They were to be assembled from every quarter. And with this pleasing object in view, the prophet again dissuades from anxious fears. Matthew Henry