"When thou passest through the waters, I will be with thee; and through the rivers, they shall not overflow thee: when thou walkest through the fire, thou shalt not be burned; neither shall the flame kindle upon thee." (Isaiah 43:2)
Although this tremendous promise is primarily to be understood in a spiritual sense (deliverance through overflowing sorrows and fiery trials), God has demonstrated His ability to fulfill the spiritual aspects of the promise by its miraculous literal fulfillment in the physical realm, on special occasions. The crossing of the Red Sea by the children of Israel is an obvious example of safe passage through deep waters.
The amazing experience of Shadrach, Meshach, and Abednego in Nebuchadnezzar's fiery furnace is the most spectacular example of deliverance from burning. As the three emerged unscathed from the "exceeding hot" flames, the king was astounded when he "saw these men, upon whose bodies the fire had no power, nor was an hair of their head singed, neither were their coats changed, nor the smell of fire had passed on them" (Daniel 3:27).
The entire world once was caused to pass through the Flood and one day must be destroyed by the fire (2 Peter 3:6, 10), but "eight souls were saved by water" (1 Peter 3:20) as the Flood carried them safely away in Noah's Ark from the violent world of the antediluvians, and all those truly trusting in Christ will be "saved; yet so as by fire" (1 Corinthians 3:15) when He comes again.
These great experiences of the past and promises of the future assure us that God is able to deliver us through the deep waters and burning trials of this present life. "That the trial of your faith, . . . though it be tried with fire, might be found unto praise and honour and glory at the appearing of Jesus Christ" (1 Peter 1:7). HMM