43 But now, thus says the Lord, your Creator, O Jacob,
And He who formed you, O Israel,
“Do not fear, for I have redeemed you;
I have called you by name; you are Mine!

² “When you pass through the waters, I will be with you;
And through the rivers, they will not overflow you.
When you walk through the fire, you will not be scorched,
Nor will the flame burn you.

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This classic, beautiful statement by God to His beloved Israel is a clear reminder to us that when God allows us to go through deep waters He will be with us in it, and that He will not allow those deep waters to overcome us.

But we might say, “that applies to Israel, and not me”.  He repeats the same sentiment toward believers in Romans 8:28-39 when He says that nothing can separate us from His love.